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2475 was a year in the 2470s in the 25th century. Events March 9 The Jiralhanae Bassus is born on Teash. The human Human colonies|colony of Algolis is established in this year. A number of civilian uprisings against the Unified Earth Government broke out in the Outer Colonies between this year and 2483. Sources

2478 was a year in the 2470s in the 25th century. Events March 2 The Jiralhanae Lydus is born on Doisac. June 2 Ripa 'Moramee, a future Arbiter, is born in the state of Moram on Malurok. June 12 James Cutter is born on Reach. Sources

2479 was a year in the 2470s in the 25th century. Events March 23 Rho 'Barutamee is born on Sanghelios. Chalybs Defense Solutions takes residence on the human Outer Colony of Meridian. Sources

2481 was a year in the 2480s in the 25th century. Events March 12 A note was created in the Wallace Fujikawa Elementary School database that detailed that Preston Cole managed to do prove to his pre-algebra teacher William Martin that he did not cheat his first final exam, by producing a second perfect score. A feat that had never been accomplished at the schools standardized pre-algebra final. July 24 The Sangheili, Parg Vol, is born on the Sangheili colonies|colony world of Malurok. The M41 SPNKR enters service in the United Nations Space Command. Sources

2483 was a year in the 2480s in the 25th century. Events A number of civilian uprisings against the Unified Earth Government broke out in the Outer Colonies between 2475 and this year. AMG Transport Dynamics begins manufacturing lightly armored all-terrain vehicles for the UNSC. Sources

2484 was a year in the 2480s in the 25th century. Events The position of captain of the ''Spirit of Fire'' is transferred from Captain Coleman to Captain Rehkov. Between November 3, 2484 and November 2, 2485 Cole's essay "The Viability of Extended Colonization" was written. Sources

2485 was a year in the 2480s in the 25th century. Events January 15 The Sangheili Chak 'Lok is born on Malurok. May 29 The Sangheili Avu Med 'Telcam is born on Saepon'kal. December 10 The Sangheili Thel 'Vadam is born in Vadam, Sanghelios. The human Human colonies|colony of Ariel is established in this year. Sources

2487 was a year in the 2480s in the 25th century. Events June 9 The Sangheili Voro Nar 'Mantakree is born on Sanghelios. September 21 The Sangheili Rtas 'Vadum is born on Sanghelios. November 5 The Sangheili Sali 'Nyon is born on Eudolaan. The newly-established People's Occupation and the Secessionist Union submit formal requests on behalf of a dozen worlds, demanding independence from Earth. With tensions rising on both sides, violence once again rocks the Outer Colonies. Sources

2488 was a year in the 2480s in the 25th century. Events April 20 The Sangheili Xytan 'Jar Wattinree is born on Sanghelios. September 21 Preston Cole completes a Military Service Enlistment Application to enlist in the UNSC Navy. November 3 L. P. Graves Cole's UCMB evaluation|evaluates Cole's performance at Unified Combined Military Boot Camp UCMB Sierra Largo|Sierra Largo, recommending he be moved on to the Non-commissioned officer|NCO path. Two decades after 2468 Harvest had the highest agricultural productivity rate per capita of any UNSC colony. Harvest is the most productive planet in the UNSC, producing fruits and other crops. Sources

2489 was a year in the 2480s in the 25th century. Events February 12 The Sangheili Inslaan 'Gadogai is born on Joyous Exultation|Saepon'kal. March 5 Jul 'Mdama is born in Mdama, Sanghelios. July 3 Danforth Whitcomb is born in Earth. September 22 While aboard Colonial Military Authority|CMA CMA Season of Plenty|''Season of Plenty'' Crewman Apprentice Preston Cole formulates a new way of calculating Slipspace|slipspace input parameters, attracting the attention of his superior officers. October 16 Preston Cole writes to his brother Michael Cole about his work on the CMA Season of Plenty. November 27 Preston Cole is recommended to Luna OCS Academy in ''Season of Plenty's'' bi-annual personnel review. A year and a half prior to January 2489 Gladys Wilson started her career in special forces. Sources

2490 was a year in the 2490s in the 25th century. Events The Sangheili Jega 'Rdomnai is born on Sanghelios. September 4 Terrence Hood is born. The human Human colonies|colony of Aleria is established in this year at the tail end of the Elduros system's period of low solar activity. Human colonies|Human space encompasses more than 800 worlds throughout the Orion Arm of the Milky Way Galaxy (ranging from fairly well-tamed planetary strongholds to tiny hinterland settlements). Outward expansion continued, and the Inner Colonies become a political and economic stronghold, though they rely heavily on raw materials supplied by the Outer Colonies. During this period, the planet Reach (orbiting Epsilon Eridani, right on Earth's metaphorical doorstep) becomes the United Nations Space Command|UNSC's primary Naval yard and training academy. Reach is a major producer of warships and colony vessels, as well as a training ground for covert operatives and Special Forces. 007 Contrite Witness, Monitor of Installation 02, contacted Installation 00 for a status update. Sources

2491 was a year in the 2490s in the 25th century. Events January 48452-556-EPN644, a member of the The Assembly|Assembly, submits himself for vivisection by the humans, with the intent of sparking an interest in the long-dormant Orion Project. January 29 The Orion program is re-initiated. After January 29 Gladys Wilson volunteered for the ORION program after a year an a half of special forces, where her superior Aaron Lewis only accepted the transfer to get rid of her. April 2 The planet Onyx is discovered and first investigated in this year. May 6 A report is made on Onyx, the planet being recommended for colonization. July 8 The Jiralhanae Tartarus is born on Doisac. Elias Carver publishes a set of theories known as the Carver Findings. The Assembly decides to have Onyx removed from the list of potential planets for colonization, due to the advanced Forerunner|alien technology present on the planet. The M99 Stanchion presumably enters production for service within the UNSC. The position of captain of the ''Spirit of Fire'' is transferred from Captain Rehkov to Captain Donald. Between October 25 2490 to October 23 2492 Rear Admiral (Lower Half)|Rear Admiral Ned Rich is born. Sources

2492 was a year in the 2490s in the 25th century. Events February 19 A report is made on geological studies carried out on Onyx. March 19 Catherine Halsey is born in the coastal city of Port Vernon on Endymion. March 21 Franklin Mendez is born on Sigma Octanus IV. June 4 According to Preston Cole, he was on watch at Shadow Perimeter 3 around Mare Nubium with Parkins, Haverton, and Tasov. June 7 Preston Cole appears before the Board of Inquiry at Luna OCS Academy to testify about a series of incidents involving the impregnation of Admiral Konrad Volkov's daughter Inna Volkov. June 9 Mitchell Lima|Colonel Lima drops his charges of contempt and obstructing the tribunal's investigation against Cole, who is cleared of any wrongdoing. June 13 UNSC-JAG ORD: 8-PD-3861 is used to seal the file of Cole's testimony to the Board of Inquiry. August 17 Quinn Lloyd issues a Wikipedia:Marriage license|marriage license for Preston Cole and Inna Volkov. The couple are subsequently married by Harold Yates, with Cole family|Michael H. Cole and Admiral Konrad Volkov witnessing. August 21 The Wikipedia:Marriage certificate|marriage certificate of Preston Cole and Inna Volkov is officially recorded. December 12 Inna Volkov gives birth to Ivan Troy Cole at 0445 hours. Knowing the child is not biologically his, Preston nevertheless accepts him as his son. December 16 The State of Mare Nubium Department of Health|birth certificate of Ivan Troy Cole is registered. December 22 The Sangheili Orna 'Fulsamee is born on Aru'spaw. A very large rebellion occurs on the colony world Far Isle, with the UNSC unable to control it. A Code: Bandersnatch is thus declared, nuclear weapons being used to put down the rebellion. The Covenant stumbles upon Doisac, the Jiralhanae homeworld. The Jiralhanae were just beginning to recover after warring themselves back into a pre-industrial state during the First Immolation, and were quickly forced into submission by the Covenant's superior forces, making them the final species absorbed into the alliance. Sources

2493 was a year in the 2490s in the 25th century. Events March 2 The Sangheili Okro 'Vagaduun is born on Feldokra. April 17 The Jiralhanae Avitus is born on Doisac. A major uprising occurs in the population centers on Talitsa. The enters service with the UNSC, with the , commissioned and released from Mars' shipyards, being the first one. Sources

2494 was a year in the 2490s in the 25th century. Events January The patrolling UNSC Callisto|UNSC ''Callisto'' performs a routine inspection of a colonial vessel. It goes tragically awry, shots are fired, and colonists are killed. March 2 Three UNSC Destroyers confront the insurgent-controlled UNSC Callisto|UNSC ''Callisto'' in the 26 Draconis System at the culmination of the Callisto Incident|''Callisto'' Incident. It is effectively the beginning of the Insurrection. April 14 The Sangheili Rojka 'Kasaan is born on Glyke. June Rebels under the leadership of ex-United Nations Space Command UNSC Marine Corps|Marine Colonel Robert Watts, perpetrated a series of attacks in the Eridanus System. December The government of Eridanus II call the UNSC for aid to help contain the growing rebel situation. Sources

2495 was a year in the 2490s in the 25th century. Events January Lead by Colonel Robert Watts, Eridanus II is claimed by the Secessionist Union. February 8 Jacob Keyes is born on Earth. December 12 The insurrectionist philosopher, Yera Sabinus, writes "No prison can hold a free mind" on toilet paper with her blood while incarcerated at Colonial Administration Authority Detention Center 3063-OM-Y. The United Nations Space Command|UNSC takes control of the station and adds Deuterium fusion reactor|fusion reactors and a Shaw-Fujikawa Translight Engine, turning the ''Hopeful'' into the largest mobile battlefield hospital in history. The VK78 Commando is introduced into Colonial Military Authority service, to replace the aging HMG-38 heavy machine guns. The Sundered Legion start fueling a number of conflicts and discord throughout Meridian. After the Sundered Legion start fueling conflicts on Meridian The Siege of Athea begins between the United Nations Space Command and the Sundered Legion. Two years after 2493 After only two years of service, the s, including the , are temporarily scrapped by the UNSC Navy. Sources

2496 was a year in the 2490s in the 25th century. Events January 12 Operation: CHARLEMAGNE begins: The Insurrectionist#Eridanus rebels|Eridanus insurrection is defeated by United Nations Space Command|UNSC forces at the cost of four UNSC destroyer|destroyers. With ORION soldiers being deployed for the first time. However, the rebel forces remain active in the system, with their command elements escaping. into the Eridanus Secundus|asteroid belt, with raids happening since. A group of ORION Project operatives attack the rebels in a swift and silent Special operations|special operation that results in only one casualty for the ORIONs and several crippling losses for the rebels. Starting this year, all s are fitted with two powerful outrigger Magnetic Accelerator Cannon|MAC systems one on each side of its main fuselage. After Operation: CHARLEMAGNE Operation: VERITAS: An ORION team secures a NOC list of undercover Secessionist Union operatives working in various high-level offices within the CMA. Sources

2497 was a year in the 2490s in the 25th century. Events The Colonial Military Authority's involvement with the Eridanus system|Eridanus cell of the Insurrectionists is made publicly known. The CMA's power begins to shift toward United Nations Space Command|UNSC control. The SP42 Cobra enters service with the UNSC Marine Corps during Operation: CHARLEMAGNE. The UH-144 Falcon enters service with the UNSC Army. The UNSC Navy reintroduces the s for counterinsurgency operations, as command-and-control vessels. Sources

2498 was a year in the 2490s in the 25th century. Events January 16 The United Nations Space Command|UNSC colony of Arcadia opens the DSRA, (Deep Space Research Array), designed to research and study extremely high gravity events, such as black holes, and other areas that exploratory vessels cannot visit directly. The DSRA is eventually destroyed by the Covenant Empire|Covenant during the Battle of Arcadia|initial attack on Arcadia in 2531. June 16 The Jiralhanae Decimus is born on Doisac. The AC-220 Vulture gunship enters service this year. Sources

2499 was a year in the 2490s in the 25th century. Events July 11 The Sangheili Sesa 'Refumee is born on Feldokra. August 5 The Jiralhanae Feodruz is born on Doisac. October 19 The Sangheili Gek 'Lhar is born on Alytcos, Sanghelios. The position of captain of the , the is transferred from Captain Donald to Captain Johnson (Spirit of Fire)|Johnson. The shop Jimmy's Books & Stationers is established. Manufactured by Halifax Spacewerx, the enters service. Manufactured by Aerofabrique SA, the enters service. Manufactured by Ceres Industrial Metals, the enters service. The human Human colonies|colony of Amadora is established in this year. Sources

|nicknames= |battles=Battle of Mesra |commanders=BGEN Artur Pahlavi }} The 24th Marine Engineering Brigade was a brigade of combat engineers in the UNSC Marine Corps, active in the earliest years of the Human-Covenant War. History In 2526#May|May-June 2526, the brigade was involved in the fighting of the Battle of Mesra. During the battle, the Covenant elected not to Glassing|glass the planet, instead deploying invasion forces onto the surface to capture the planet's rich mineral veins, including xenotime. The 24th were thus deployed onto the planet in a large-scale asset-denial operation, using nuclear weapons to destroy the mining infrastructure and render any of the ore veins unuseable. The fighting was conducted over the course of eight days, with the Marines working alongside the Militia of Mesra to keep the Covenant at bay. Due to the local militia conducting most of the heavy lifitng during the fighting, the Marines supplied much of their combat equipment for use including Anaconda surface-to-air missiles. On the eighth day of fighting, the Marine HQ was located in the Doukala Xenotime Works, the final xenotime mine on the planet needing to be destroyed. With the brigade primarily intended for demolition operations, they were reliant on the Militia and the reinforcement of Blue Team to hold off a massive Covenant armoured column. Unfortunately, the attempts to resist the alien advance were defeated and dozens of Wraith tanks were able to spill across the Nasim Bridge and begin an advance on the brigade HQ. A platoon of the brigade's Marines were dispatched to assist Blue Team in their retreat in the hopes that the brigade might be able to hold off the Covenant; though the intervention of Admiral Preston Cole|Cole saw Blue Team extracted off-world via prowler to begin an operation to Battle of Netherop|capture a downed Covenant frigate, the "''Lucky Break''". The 24th Marine Engineering Brigade were ultimately unable to complete their objective, and instead began a general evacuation. However, the Covenant's orbital superiority over Mesra meant that the Marines' lightly-armoured transports would have most likely been destroyed by their Space fighter|strikecraft pickets. The ''Night Watch'' waited until the Marine evacuation began to extract, intending to use them as a cover to exit the planet undetected. Structure In mid-2526, the unit was commanded by Brigadier General Artur Pahlavi. During the conflict on Mesra, Pahlavi went by the callsign of "Brigade Actual". The brigade's HQ element had the callsign "Brigade Tactical". Overall, the brigade had around 5,000 personnel. List of appearances ''Halo: Oblivion'' Sources Category:UNSC Marine Corps units

2500 was a year in the 2500s in the 25th century. The year 2500 took place during the Covenant's Ages of Doubt|23rd Age of Doubt. It saw a major change in the UNSC's tactics used against the Insurrection, as Operation: KALEIDOSCOPE was launched this year. Events March 9 Preston Cole sends a communique to his wife, Inna Volkov, urging her to reconsider her recent filing for divorce. May 28 Andrew Del Rio is born on Earth. September 15 James Cutter was sent to the UNSC School of the North Star, on Earth, to study astro-navigation and political science. October 14 The Jiralhanae Deukalion is born on Doisac. Around 5 years after 2495 The UNSC wrests control of Meridian from the Sundered Legion during the Siege of Athea. Start of the 26th century The UNSC initiates Operation: KALEIDOSCOPE, a series of highly classified surgical strikes against prominent insurrectionist leaders. Between October 21, 2499 to October 19, 2501 Carlos Wambua is born. Sources

2501 was a year in the 2500s in the 26th century. Events May 29 John Forge is born on Earth. June 2 Skirmish at Theta Ursae Majoris - The and the Insurrectionist ''Bellicose'' fight to a draw in the Theta Ursae Majoris System. September 4 Captain (UNICOM)|Captain Preston Cole writes to his brother Michael Cole regarding his search for the ''Bellicose'', and asks him to tell Inna Volkov|Inna and his kids that he loves them. December 4 Chris Preston is born. December 5 The Jiralhanae Ballas is born on Doisac. After a young Catherine Halsey continues to defy educatory standards at Endymion Gifted, the Koletre-Browning University's Dean of Biological Science funds her education and relocation to the university on Circumstance. Sources

2502 was a year in the 2500s in the 26th century. Events March 12 Captain (UNICOM)|Captain Preston Cole writes to his brother Michael Cole, talking about Lyrenne Castilla and how good she is at plasma physics, also suggesting that he and Molly Cole potentially visiting the Outer Colonies. March 13 Jerald Mulkey Ander, the leader of the Secessionist Union on Harvest, is assassinated by Avery Johnson as part of Operation: KALEIDOSCOPE. May The is damaged in the Skirmish at Capella with Insurrectionist forces, resulting in the deaths of 32 crew members and requiring her to be laid up in space dock for one month for repairs. May 28 Preston Cole writes to his brother Micheal, informing him about about the skirmish at Capella, and telling him that he was allowed a month of leave that he was going to spend with Lyrenne Castilla. November 9 Preston Cole writes to his brother Michael, informing him that he has married Lyrenne Castilla, and that she is pregnant. Sources

2503 was a year in the 2500s in the 26th century. Events June 13 Admiral Harold Stanforth sends UNSC Transmission 08871D-00 to Captain (UNICOM)|Captain Preston Cole, informing him that his second wife, Lyrenne Castilla, is a high ranking Insurrectionist leader. Cole is given three hours to bring her in, but finds that she has already fled. July 6 Preston Cole writes to his brother Michael Cole, talking about how it was all true about Lyrenne Castilla being a high ranking Insurrectionist leader, and how she left a note that proved she was the captain of the ''Bellicose''. August 13 Ellen Anders is born on Arcadia. Jake Courage is born. Sources

2504 was a year in the 2500s in the 26th century. Events January 2 A Battle of Theta Ursae Majoris System|battle takes place in the Theta Ursae Majoris System between the UNSC and the Insurrectionists. June 19 James Cutter is sent to the Officer Candidate School where he was taught Command and Navigation. The UNSC Secrets Act of 2504 is passed. Sources

2505 was a year in the 2500s in the 26th century. Events September 25 The Jiralhanae Hekabe is born on Doisac. Captain (UNICOM)|Captain Johnson (Spirit of Fire)|Johnson's period as captain of the ''Spirit of Fire'' comes to an end. A building owned by the Hannibal family is built ontop Forerunner ruins. Sources

2506 was a year in the 2500s in the 26th century. Events January 3 Gage Yevgenny is born on Harvest. May 14 Sandra Tillson is born on Coral. May 21 The Jiralhanae Zeretus is born on Doisac. ORION Projectthe first attempt by the Colonial Military Authority to create and train teams of super-soldiers for covert military operations in the Outer Coloniesis deactivated. Though the soldiers were effective, their abilities fall short of original expectations, and they are far too expensive to develop and field. The soldiers in the program are reassigned to various special operations units. Around 5 years prior to September 8, 2511 The first successful cloning of a full human brain is performed. Sources

2507 was a year in the 2500s in the 26th century. Events September 30 Cadmon Lasky is born on Mars. November 16 Then-First Lieutenant James Gregory Cutter is assigned to serve on the . Roggan becomes the captain of the . Construction of the begins. Between February 28, 2506 to April 1, 2508 Hugo Barton is born. Around forty-five years prior to August 11, 2552 A river in Utkozet on planet Reach is dammed by settlers to run through a nearby Utkozet hydroelectric power plant|hydroelectric power plant. Part of the river eventually dries, leaving only the bed, though a reservoir is created at the river's head. Around three years prior to December 4, 2510 Doctoral candidate Catherine Halsey meets Elias Carver|Dr. Elias Carver at an academic social mixer. Halsey attempts to correct his formula for "the matrix mechanics of the socio-and politico-economic vectors of human expansion" for which he had used only 7 dimensional parameters in his calculations; Halsey claims he needed 16. Carver does not appreciate being challenged by a young upstart. Three weeks after Catherine Halsey met Elias Carver The UNSC approves Halsey's grant proposal for Artificial Intelligence control for N-dimensional matrices, under the provision that she first successfully test a model of their choosing, which is Carver's. It is by testing this model, using both Carver's and her own dimensional parameters, that Halsey is convinced to join the UNSC and work to end the Insurrection. Notes Sources

2508 was a year in the 2500s in the 26th century. Events June 18 April Orenski is born on Harvest. The Assembly Minority holds a strategy session where they discuss the ORION Project and what went wrong with it, also acknowledging that the project was just a necessary step on the way toward their primary goal. Catherine Halsey is recruited to join the Office of Naval Intelligence. Between March 21, 2508 to March 20, 2509 Franklin Mendez enlists in the UNSC at the age of 16, with the approval of his parents. He leaves his home for Reach. Around fifty years prior to October 29, 2558 The Hole in the Wall is founded by Pirates and outlaws on Cassidy III. Sources

2509 was a year in the 2500s in the 26th century. Events By this year, many rebel cells had combined under the leadership of Robert Watts, proudly referring to themselves at the United Rebel Front. The M850 Grizzly enters service with the UNSC. Two years after Catherine Halsey met Elias Carver Elias Carver|Dr. Elias Carver commits suicide. Sources

2510 was a year in the 2510s in the 26th century. Events May 28 Atriox is born on Doisac. August 8 Dr. Catherine Halsey makes the first entry in Dr. Halsey's personal journal|her journal following her enlistment in ONI's service and arrival on Reach. August 15 Thomas Lasky is born on Mars. August 22 Edward Buck is born in New Albany, Lombard, on Draco III. September 3 Michael Sullivan is born on Emerald Cove. September 21 Kelly-087 is born on Imber. December 1 The is launched, completing its construction over Mars, beginning its forty-two years of service in the United Nations Space Command. December 4 Doctor Catherine Halsey records in her Journal regarding meeting with Doctor Elias Carver and how she ended up at Reach. December 8 At 2302 hours, Doctor Catherine Halsey is given information regarding the ORION Project. December 15 Carris-137|Carris R. Pernault, future SPARTAN-II program|Spartan-II S-137, is born in Irbid, Tribute in the Epsilon Eridani System. December 22 Dumb AI Deja is activated. December 28 The Jiralhanae Castor is born on Doisac. The Mark III exoskeleton is introduced, but is quickly made defunct after its initial launch, moving to MJOLNIR Powered Assault Armor|Project MJOLNIR instead. The structural system of the is designed by Dr. Robert McLees (Ship Designer)|Robert McLees. Manufactured by Reyes-McLees Shipyards, the enters service. Between 2510 and 2511 The future candidates for the SPARTAN-II program are born. Notes Sources

2511 was a year in the 2510s in the 26th century. Events January 3 All data pertaining to the planet Onyx is deemed classified. February 15 Dr. Catherine Halsey in her journal delineates the fundamentals of the SPARTAN-II program, specifically her refinements in relation to the ORION Project. February 23 Dr. Halsey learns of a terrorist with the Freedom and Liberation Party that detonated a commercial nuclear explosive in the Haven arcology, and proceeds to log this in her journal. March 5 Jorge-052 is born in Palhaza on Reach. March 7 John-117 is born on Eridanus II. March 19 Linda-058 is born on Verent. April 3 Frederic-104 is born on Ballast. April 15 Serin Osman is born to Pinar Celik on Cascade. April 21 Douglas-042 is born on Asphodel. May 4 Petra Janecek is born in Serif on Lenapi. May 8 Jerome-092 is born on Minister (planet)|Minister. May 16 Caleb-095 is born in Newport on Luyten. July 10 Samuel-034 is born on Harvest. July 17 Alice-130 is born on Passage. July 30 Dr. Catherine Halsey outlines the basis of the Polymerized lithium niobocene|piezoelectric mechanical enhancement of what would become the MJOLNIR Powered Assault Armor. August 21 A terrorist associated with the Freedom and Liberation Party detonates a nuclear weapon at the Haven arcology on Mamore. The attack kills two million people and injures 8.3 million others. At 8:40+0 MMT, Intersystem News reports on the terrorist attack at the Haven arcology on Mamore. September 8 Dr. Halsey writes down her thoughts regarding the recent breakthroughs on human neural cloning in relation to the flash cloning of the SPARTAN-II candidates. She informs Vice Admiral Michael Stanforth that the project will proceed to the candidate procurement stage. September 15 Naomi-010 is born on Sansar. October 19 Kurt-051 is born in Mira on Circumstance. October 22 A report is made on Forerunner artifacts that are found during routine excavations in an area designated Zone 67. Randall-037 is born in Hull, England, on Earth. Jack Pilvros Hannibal tests the first small-scale quantum photonic amplifier on COM|SATCOM relays, revolutionizing the speed and integrity of extraplanetary communications. Between 2510 and 2511 The future candidates for the SPARTAN-II program are born. Sources

2512 was a year in the 2510s in the 26th century. Events April 12 The Jiralhanae Hyperius is born on Doisac. December 19 The Superintendent AI is created. December 21 The Jiralhanae Tremonius is born on Doisac. Admiral Michael Stanforth is appointed the Section Chiefs|head of Section Three of the Office of Naval Intelligence. The M392 Designated Marksman Rifle is introduced into service. Around 40 years prior to August 25, 2552 Around this year, a geological survey team on Sigma Octanus IV finds rocks with odd compositions. They later found out these rocks were introduced from meteor impacts roughly 57,448 BCE|60,000 years earlier and contained a Sigma Octanus IV artifact|Forerunner shard among them. Around 40 years prior to September 12, 2552 The Chiroptera-class subprowler|''Chiroptera''-class subprowler is retired by the United Nations Space Command|UNSC. Sources

2513 was a year in the 2510s in the 26th century. Events January Under the leadership of Robert Watts, the United Rebel Front retakes Eridanus II. May 21 As part of the first part of Operation: TREBUCHET, United Nations Space Command forces arrive at Eridanus II to crush the United Rebel Fronts rebellion, though Robert Watts and a significant number of the group manage to evacuate. June 19 Dr. Catherine Halsey decides upon the final name of the SPARTAN-II program, up until then tentatively referred to as "ORION Project Generation Two". November 19 Ram Chalva is born on Komoya. Brain mutations are specifically outlawed by the UNSC MED CORPS. Colonel Ponder leads a force into Elysium City to retrieve Robert Watts second in command. A confrontation develops and due to an overeager sniper, a grenade is detonated causing Ponder to lose his arm and be demoted. A research team from Algolis who was working on Project HRUNTING evaluated the Mark III exoskeleton eventually leading to the HRUNTING Mark III (B) Cyclops. Alexander becomes the sixth captain of the . Ellis Gass is born on Carrow. Sources

2514 was a year in the 2510s in the 26th century. Events January 9 Then-First Lieutenant James Gregory Cutter is transferred to serve on the , having formerly been assigned to the . This year, Franklin Mendez is transferred to Naval Special Weapons. Sources

2515 was a year in the 2510s in the 26th century. Events November 21 The Jiralhanae Tovarus is born on Doisac. December 4 Veronica Dare is born on Actium. Dr. Catherine Halsey becomes scientific advisor in the Office of Naval Intelligence. Work begins on MJOLNIR Powered Assault Armor. Manufactured by SinoViet Heavy Machinery, the enters service. Around 37 years prior to 2552 Ethan Graves is born in the Jovian Habitats|Jovian habitat clusters on Io. Sources

2516 was a year in the 2510s in the 26th century. Events A major uprising occurs in the population centers on Talitsa. Around 36 years prior to 2552 Jane Shebura is born. Sources

2517 was a year in the 2510s in the 26th century. It was a very important year for the United Nations Space Command, as this marked the initiation of the candidate procurement and SPARTAN-II training|training of the SPARTAN-II program, which would eventually give birth to some of humanity's greatest heroes. Events July 21 Catherine Halsey|Dr. Catherine Halsey initiates the screening process for SPARTAN-II program|SPARTAN-II candidates. Vice Admiral Michael Stanforth provides her with the ''Han'' and Lieutenant Junior Grade Jacob Keyes as a requisite pilot and attache. Halsey goes on to survey candidates in FLEETCOM Sector Four|Sector 4 while her team does the same elsewhere in the colonies. August 17 At 0430 hours; Dr. Catherine Halsey and Lieutenant Junior Grade Jacob Keyes wake from Cryonics|cryo Cryo chamber|chambers on the ''Han'' as it arrives near Eridanus II, and discuss the plan to meet a child on the planet. At 1130 hours; Dr. Halsey and Lieutenant Keyes meet 6-year-old John-117|John, candidate #117, on Eridanus II. John passes a test conducted by Halsey and is unknowingly accepted into the SPARTAN-II program. September On Sansar, Staffan Sentzke sneaks into his house red-and-white wrapping paper for his daughter Naomi-010|Naomi Sentzke's birthday. September 10 Dr. Catherine Halsey selects the final seventy-five candidates for the Spartan-II tells the Dumb AI|"Dumb" Artificial intelligence Deja to give the order to kidnap them for Spartan-II program. At around 1700 hours, on Sansar; Staffan Sentzke and Lena Sentzke prep for their daughter Naomi's birthday, while she is heading home from music practice. During the ride home, Naomi heads off the bus early and is conscripted for the SPARTAN-II program, and Staffan and Lena worry about where she went. At 2005 hours, the local police on Sansar are hunting for Naomi using canine unit and the Pelican unit. September 11 At around 0600 hours on Sansar; the Flash cloning|flash clone of Naomi is found at a bus stop southwest of New Stockholm. September 14 Dr. Catherine Halsey prepares the Spartan-II program Candidate record on Carris-137. September 15 Dr. Catherine Halsey records in her journal that every Spartan-II candidate exceeded the selection criteria. Dr. Catherine Halsey records in her journal that on Imber, Kelly-087|Kelly Shaddock eluded Retrieval team Gamma for six hours but eventually comes forward, thinking abduction is a game for her birthday. Her near-escape results in the implementation of new retrieval protocols to avoid further mistakes. September 16 Dr. Halsey and Jacob Keyes part ways after screening candidates for the SPARTAN-II program. Afterwards, Dr. Halsey has Jacob Keyes promoted to full Lieutenant and reassigned to the . September 18 Dr. Catherine Halsey prepares the Spartan-II program Candidate record on Kurt Ambrose|Kurt-051. September 21 Dr. Catherine Halsey prepares the Spartan-II program Candidate record on Caleb Aagard. September 23 The 75 children kidnapped for the SPARTAN-II project are brought on Reach and conscripted into the SPARTAN-II program per Naval Code 45812. September 24 The 6-year-old SPARTAN-II trainees awaken for their first day of training. They are led by Chief Petty Officer Franklin Mendez and are introduced to the AI Deja. The cargo vessel is boarded and seized by the Insurrectionist|Eridanus rebels. September 25 John, Kelly, and Sam-034|Sam become friends during their second "Ring the Bell" training exercise. September 28 The SPARTAN-II candidates receive haircuts. Kelly-087 disarms the master sergeant barber of his clippers; three attendants are required to pin her down and shave her head. November 4 John-117 had a picoliter of blood drawn for testing. December 7 At 0901 hours; John-117's flash clone dies. December 24 Dr. Halsey receives a report on the unexpected longevity of the SPARTAN-II flash clone replacements and assigns Codename: JACKBOOT to track their further progress. Around seven weeks prior to August 17, 2552 Jacob Keyes graduates UNSC OCS as Lieutenant, Junior Grade|Lieutenant, JG. Sources

2518 was a year in the 2510s in the 26th century. Events February 5 Dr. Catherine Halsey reviewed Kurt Ambrose|Kurt-051's progress noting he was good at bonding with his team. The review contained a image a battle in 1066 that Kurt drew. May 7 Fernando Esparza is born on Charybdis IX. December 10 Dr. Catherine Halsey makes an entry in Halsey's journal|her journal wherein she identifies four Spartan-IIs that she and Franklin Mendez agree are the best candidates for leadership out of all the children in the program. Those four are Kurt-051, Jerome-092, Frederic-104, and John-117. Mendez is leaning towards Kurt but Halsey is confident that John is the best choice. 5 months after September 2517 Doctor Catherine Halsey summons Jai-006 and Adriana-111 regarding their escape attempts and manages to convince them to say by saying that she offers them a family in the form of the Spartan program. Sources

2519 was a year in the 2510s in the 26th century. Events June 3 Taylor Miles|Taylor H. Miles is born in Losantiville, Seven Hills, on Mars. July 12 At 0630 hours, the Spartan-IIs, in their second year of SPARTAN-II training|training, are sent to the Military Wilderness Training Preserve in the snowcapped Highland Mountains|mountain range on Reach. From 0645 to 0801 hours, John-117 explores the forest until joining up with the rest of Spartans. At 2104 hours, the Spartans have returned to the Reach Naval Academy after stealing an D96-TCE Albatross|Albatross dropship. John-117 earns the status of Squad Leader. October 31 The Sangheili Usze 'Taham is born on Sanghelios. 18 months after September 2517 Naomi-010|Naomi Sentzke's flash clone dies. Lena Sentzke is sterilized soon after. 6 months after Lena Sentzke is sterilized Lena Sentzke commits suicide. Sources

2520 was a year in the 2520s in the 26th century. Events May 7 Veta Lopis is born on Gao. May 14 Gretchen Ketola is born on Harvest. July 20 Alexander (captain)|Captain Alexander, the last civilian captain of UNSC Spirit of Fire|UNSC ''Spirit of Fire'', retires from active duty at the conclusion of the Verent mission. The ship is requisitioned by the UNSC and scheduled for refit. August 27 Carter-A259 is born on Durban, Biko. September 1 ''Spirit of Fire'' completes an extensive refit at the Reach orbital shipyards before entering active military duty as a ground support vessel, initially detailed with providing ground support for Operation: TREBUCHET. September 27 The SPARTAN-II program suffers its first casualty, when Carris-137 accidentally kills a handler during SPARTAN-II training|training. A major uprising occurs in the population centers on Talitsa. The Daily Bulletin, a Human newspaper company, began printing this year. Manufactured by Martian Metals Shipyards, the enters service. Manufactured by SinoViet Heavy Machinery, the enters service. Between January 28, 2519 and January 27, 2520 Malcolm Geffen is born, in Wolverhapton, Earth. Sources

2521 was a year in the 2520s in the 26th century. Events January 31 Hazel-A302 is born on Alluvion. October 15 Dr. Catherine Halsey records in her journal regarding the recent destruction of the after terrorists disable it, she also mentions how third generation Artificial intelligence recently became first operational. The Sniper Rifle System 99 Anti-Materiel is adopted by all branches of the United Nations Space Command armed forces because of its modularity and ongoing manufacturer support. Sources

2522 was a year in the 2520s in the 26th century. Events February 1 Henry Glassman is born on New Carthage. June 5 After years in an officially advisory role, Dr. Catherine Halsey is made chief scientist in the Office of Naval Intelligence. June 19 Elena Bobrov is born on Alluvion. October 18 The Sangheili N'tho 'Sraom is born on Sanghelios. Camber is colonized by the UNSC. Around 30 years prior to 2552 Marcus Hudson is born in New Alexandria (location)|New Alexandria on Reach. Between March 2521 and March 2522 Lian Devereaux is born on Earth. Sources

2523 was a year in the 2520s in the 26th century. Events March 11 Emile-A239 is born on Luxor, Eridanus II. July 14 Spartan-IIs train on Reach, where they successfully capture a Marine Tango Company|base flag. Manufactured by SinoViet Heavy Machinery, the enters service. A rebellion breaks out on Andesia due to many citizens becoming extremely resentful of the Unified Earth Government and the planet's mega-corporate council that serves as Andesia's ''de facto'' planetary government. April Orenski joins the Corbulo Academy of Military Science. Around eighteen months prior to December 21, 2524 At some point in the middle of the year, courtesy of increasing Insurrection activity, Jilian al-Cygni's workload begins to increase. Sources

2524 was a year in the 2520s in the 26th century. Events According to Felicia Sanderson, since the beginning of Operation: TREBUCHET a decade ago, over a million civilians have been killed. Most of them are collateral damage due to UNSC overreaction, which furthers civilian support to the Insurrectionist|rebels to some extent. January 3 Gage Yevgenny enlists in the Colonial Military Authority.Halo: Evolutions, "Dirt", ''page 105'' ; Volume I, ''page 138'' January 18 A telescope on Mars, CFHT-Mars, while recording the Rosette Nebula, captures the first ever human photograph of the Covenant mobile planetoid, ''High Charity''. The discovery is sent to Dr. Catherine Halsey for evaluation.Halo: Reach Limited Edition, ''Dr. Halsey's personal journal'' February 28 Jun-A266 is born on Tyumen, New Harmony. May 22 James Cutter receives a Bronze Star for his actions aboard the . June 12 Kojo Agu|Kojo "Romeo" Agu is born in the Castra Arcology, Castra, on Madrigal. Mid June Insurrectionists hit the luxury liner ''National Holiday'' above Reach, detonating unmanned orbital taxis loaded with explosives against its hull. The ship plummets into Reach's atmosphere, burning up via re-entry. The Office of Naval Intelligence manages to portray it as a tragic accident.Halo: Contact Harvest, ''page 127'' June 16 Staff Sergeants Nolan Byrne and Avery Junior Johnson|Avery Johnson lead two four-man teams on a raid in the city of Casbah on Tribute to find rebel bombs. The assault is part of Operation: TREBUCHET. August 7 Marcille Johnson passes away.Halo: Contact Harvest, ''page 41'' August 10 Johnson arrives in Chicago, United Republic of North America|URNA, after the botched operation on Tribute. He goes to visit his aunt Marcille, only to find that she had passed away three days ago. In grief, he goes on a drinking spree. Eventually, he is found by Lieutenant Downs.Halo: Contact Harvest, ''pages 37-48'' August 13 Johnson is transferred to Harvest to train the Harvest Militia|local militia. September 2 The freighter ''Horn of Plenty'' emerges from Slipstream Space|Slipspace in error, courtesy of a radiation leak, and sends out a distress beacon. The beacon is futile, however, as the ship is attacked and captured by a Covenant Empire|Covenant vessel.Halo: Contact Harvest, ''page 23'' September 3 Horn of Plentys navigation box is retrieved by Covenant forces and its contents are analyzed by the Huragok Lighter Than Some. Lighter Than Some finds the vessel's point of origin. The Covenant ship, ''Minor Transgression'', heads off to obtain more spoils.Halo: Contact Harvest, ''pages 49-59'' September 16 Horn of Plentys signal reaches Harvest, being received by the Artificial Intelligence|artificial intelligence construct Sif.Halo: Contact Harvest, ''page 28'' September 18 Rion Forge is born on Earth. November 17 Dr. Catherine Halsey writes in her journal about previously reuniting with Lieutenant Jacob Keyes while attending a conference at the University of Calippus. Their rendezvous left Halsey pregnant with their daughter, Miranda Keyes|Miranda. December 21 The , carrying Staff Sergeant Johnson and many others, arrives in the Epsilon Indi system.Halo: Contact Harvest, ''page 60'' Simultaneously, ONI operative Jilan al-Cygni is briefed by the AIs Sif and Mack.Halo: Contact Harvest, ''page 68'' Late December The Prophet of Restraint impregnates a female San'Shyuum, despite his defective genes making it illegal for him to reproduce. With the mother refusing an abortion, a scandal starts brewing over the issue.Halo: Contact Harvest, ''pages 264-265'' *''Minor Transgressions crew launches a raid on the freighter ''This End Up'', killing its captain, Henry Gibson. A while later, Sif reports the attack to al-Cygni, both realizing that it was the only ship in the area with a human crew.Halo: Contact Harvest, ''pages 96-104'' Office of the High Prophet of Restraint issues an Edict, following an incident with the Kig-Yar ship ''Pitiless'', that teams of Unggoy and Sangheili are to search all Kig-Yar vessels for evidence of "Unclean Beings". Arounda year prior to the start of the Human-Covenant War''' UNSC forces quell a colonial rebellion on Persia IX. Notes Sources

2525 was the year in the 2520s in the 26th century. It was a year that saw the start of the Human-Covenant War, which would become a twenty-seven year long engagement between the Covenant|Covenant Empire and the United Nations Space Command. The war began after First Battle of Harvest|first contact between the belligerents at the human Outer Colony of Harvest. The emergence of the Covenant threat prompted the training of the Spartan-II supersoldiers to be accelerated and Blue Team|a group of them were selected for their Operation: TALON|very first live combat mission in September of this year, an operation to capture the United Rebel Front colonel, Robert Watts. Events January 2 Staff Sergeants Avery Johnson and Nolan Byrne, along with Ponder|Captain Ponder and Healy|Petty Officer, First Class Healy, begin training Harvest's Colonial Militia.Halo: Contact Harvest, ''page 105'' January 5 Rosenda-A344 is born on Earth. January 16 Members of the Harvest militia go on a march carrying 25 kilogram rucksacks. Afterwards, Johnson and Ponder attend Harvest's Solstice Celebration. Johnson is briefed by Jilan al-Cygni as to why he and Byrne are there: to prevent Insurrectionist attacks on UNSC freighters.Halo: Contact Harvest, ''pages 105-123'' January 17 The Covenant ship ''Minor Transgression'' attacks a human ship (the ''Bulk Discount''), said human ship having the ''Walk of Shame'' in support and hosting not only Johnson and Byrne but also an arsenal of weapons. The aliens are repelled (though Johnson receives a fractured skull) and the ship destroyed, though Dadab and Lighter Than Some are able to escape in an escape pod after making a report on the relics they've found.Halo: Contact Harvest, ''pages 124-136'' Colonial Militia trainees Wallace Jenkins, Forsell, Wick and Andersen begin target practice.Halo: Contact Harvest, ''page 137'' The Ministry of Fortitude holds a statistic-based meeting. The Minister of Fortitude takes stimulants to help him through the ordeal.Halo: Contact Harvest, ''page 143'' January 18 Fortitude wakes up, the hangover effect of the stimulants taking hold. The Vice Minister of Tranquility alerts him to the Luminary detections made by ''Minor Transgression''. They resolve to use them to usher in an Age of Reclamation and secure their position as the next trio of Hierarchs.Halo: Contact Harvest, ''pages 143-158'' ''Walk of Shame'' is dispatched to Reach to request that FLEETCOM send a battle group in the event of first contact escalating into bloodshed.Halo: Contact Harvest, ''page 166'' January 19 Johnson regains consciousness and is debriefed by Nils Thune and al-Cygni. Johnson resolves to accelerate the militia's training.Halo: Contact Harvest, ''pages 159-166'' February 3 At 1423 hours, Harvest's Tiara makes long-range radar contact with the Covenant cruiser ''Rapid Conversion''. Contact is lost with Harvest soon after. February 9 Jonathan Doherty, is born in Crisium City, Naniwa on Luna. February 11 First formal contact between the Covenant and humans on Harvest at the Harvest Botanical Gardens. Communications go awry and the Human-Covenant War begins. The Covenant forces, led by Jiralhanae Chieftain Maccabeus, retreat to ''Rapid Conversion'' in high orbit over Harvest.Halo: Contact Harvest, ''pages 256-259'' The Human-Covenant War begins. Jilan al-Cygni deploys a RQ-XII drone.Halo: Contact Harvest, ''page 391'' February 22 After a week of remaining still, ''Rapid Conversion'' attacks the small, remote town of Gladsheim, while s, Jiralhanae, and Yanme'e slaughter its residents. The Harvest militia evacuates the town's few survivors, resulting in the injury of Maccabeus and the death of Ritul.Halo: Contact Harvest, ''pages 279-286'' February 23 Evacuation of Harvest. About 22,000-23,000 civilians are killed. Tartarus kills Maccabeus and takes control of the Covenant forces. ''Rapid Conversion'' is disabled by Harvest's mass driver while colonists and militiamen escape to the Tiara.Halo: Contact Harvest, ''pages 335-336'' Large firefights at the Tiara and Harvest's Harvest reactor complex|reactor complex ensue. Notable deaths include Ponder, Vorenus, Dadab, and Lighter Than Some. Loki destroys the Tiara.Halo: Contact Harvest, ''pages 368-385'' February 28 Miranda Keyes|Miranda Halsey is born to Catherine Halsey and Jacob Keyes,Halo: Reach Limited Edition, ''Intersystem News, LCDR Miranda Keyes Awarded Silver Star'' on Luna. March 6 The Office of Naval Intelligence declares Onyx classified after the discovery of Forerunner artifacts.Halo: Ghosts of Onyx, ''page 127'' March 9 At 1130 hours, the SPARTAN-II program|Spartan-IIs undergo rigorous chemical, physical and biological SPARTAN-II augmentation procedures|augmentations onboard Medical Facility Endurance in orbit over the planet Reach.Halo: The Fall of Reach, ''pages 55-59'' (2001 version); ''pages 73-77'' (2010 version) At 1552 hours, John-117's surgery starts.Halo: Fall of Reach (hardcover), chapter ''Halo: Fall of Reach - Boot Camp|Bootcamp 2'' March 25 The Spartan-IIs awaken aboard ''Endurance'' and Halsey assesses the results.Halo: The Fall of Reach - The Animated Series Thirty-three Spartans successfully pass the alterations. ("''Only 33 of the candidates survived without significant injury.''") Thirty subjects have died, and twelve are permanently disabled. March 30 Funeral service is held for those who died undergoing augmentations in the SPARTAN-II program, aboard en route to the Lambda Serpentis system.Halo: The Fall of Reach, ''pages 60-63'' April 1 Catherine Halsey|Doctor Catherine Halsey has the bodies of the deceased SPARTAN-IIs Cryonics|cryogenically preserved in hopes of reviving them in the future. The augmentation washouts are given desk jobs to allow them to continue to support the UNSC.Halo: Reach, ''Dr. Halsey's personal journal'' April 20 arrives in the Epsilon Indi system and makes a confirmation transmission. No further reports are received.Halo: The Fall of Reach, ''page 118'' (2010 edition) April 21 Mack detects the CMA ''Argo'' enter Harvest's orbit. He attempts to warn ''Argo'' of the Covenant, but the scout ship is destroyed by ''Rapid Conversion''.Halo: Contact Harvest, ''page 393'' April 22 John-117 kills two Marines of the 105th Shock Troops Division and severely wounds another aboard ''Atlas'' in an incident secretly engineered by ONI to test the efficiency of the SPARTAN-II augmentations.Halo: The Fall of Reach, ''pages 63-69'' May 11 Preston Cole's liver fails from cirrhosis, and is subsequently replaced - as are his damaged heart and endocrine system - with flash-cloned transplants.Halo: Evolutions - Essential Tales of the Halo Universe, "The Impossible Life and the Possible Death of Preston J. Cole", ''page 459'' June 27 Dr. Halsey begins to plan therapies, experimental surgeries, and rehabilitations for over eighty percent of the SPARTAN-II augmentation washouts. Some of the protocols are estimated to take years to complete. Artificial intelligences predict a fifty percent success rate, though Halsey believes the Spartans' will to serve the UNSC will boost the success rate. June 28 Dr. Halsey moves her research from Camp Hathcock to CASTLE Base, declining an invitation of working in a corner suite in Olympic Tower. June 30 The UNSC Special Forces#Naval Special Warfare Command|NAVSPECWEP approves the limited-run production of the MJOLNIR Mark IV armor, four months after the prototypes were sent. A test case file was unintentionally "attached" to an official response to Catherine Halsey. The file showed a volunteer attempting to use a prototype of the MJOLNIR Powered Assault Armor, resulting in his death due to his lack of training and proper physiology. July 1 Mack begins burying the MagLev train|MagLev strands of the Tiara as the Covenant begins to glass Harvest.Halo: Contact Harvest, ''page 395'' August 8 Captain James Cutter is assigned command of the . September 1 Dr. Halsey works on improving the MJOLNIR Powered Assault Armor prototypes. Due to its secrecy, she relocates the Materials Group division working on the armor to Damascus Testing Facility in Vhalkem on Chi Ceti IV. September 11 SPARTAN-IIs train with the MJOLNIR Powered Assault Armor#Mark I exoskeleton|Mark I armor in the Reach FLEETCOM Military Complex|Reach UNSC Military Complex. Dr. Halsey determines the soldiers are ready for their first mission.Halo: The Fall of Reach, ''pages 69-74'' September 12 SPARTAN-IIs are briefed on their first mission aboard the UNSC destroyer|destroyer , capturing United Rebel Front leader Robert Watts|Colonel Robert Watts.Halo: The Fall of Reach, ''pages 75-81'' John-117 is promoted to Petty Officer, Third Class.Halo: The Fall of Reach, ''page 77'' September 14 The Assault on Eridanus Secundus. Blue Teamconsisting of John-117, Samuel-034, Linda-058, Kelly-087, and Frederic-104infiltrate URF military base Eridanus Secundus in the Eridanus system's asteroid belt. Robert Watts is captured by the SPARTAN-IIs and returned to the UNSC. The asteroid's hangar bay is damaged by Sam, causing it to vent atmosphere.Halo: The Fall of Reach, ''pages 81-94'' October 7 Battle Group 4, composed of the , the and the enters the Epsilon Indi system and make contact with a Covenant ship. The Covenant ship destroys the ''Vostok'' and the ''Arabia'' with only the badly damaged ''Heracles'' escaping. The Covenant ship broadcasts the following message to the battlegroup: "Your destruction is the will of the Gods...and we are their instrument," in complete English, showing that the Covenant have been studying humanity for some time.Halo: The Fall of Reach, ''page 98'' October 15 Thom-A293 is born on Dwarka. October 31 FLEETCOM recieves the Covenant's declaration of war.''Halo: Silent Storm'', chapter 2 November 1 UNSC is put on full alert for the Covenant. The training of the SPARTAN-IIs is accelerated. The CMA combat forces are immediately placed under the UNSC's NAVCOM/UNICOM for preparation for the upcoming war.Halo Wars, ''Halo Wars Timeline Events|Timeline'' November 2 Office of Naval Intelligence agents Jack Hopper|Lieutenant Commander Jack Hopper and Demos|Lieutenant Demos convince Preston Cole|Vice Admiral Preston Cole to come out of retirement and lead the fleet to retake Harvest.Halo: Evolutions - Essential Tales of the Halo Universe, "The Impossible Life and the Possible Death of Preston J. Cole", ''page 460'' The SPARTAN-IIs are informed of hostile contact with the Covenant and the fate of Harvest. They are introduced to Project MJOLNIR.Halo: The Fall of Reach, ''pages 94-101'' November 3 Dr. Halsey begins to analyze the Covenant. November 5 Many high-ranking personnel within the UNSC begin to show fear of the Covenant. Dr. Halsey and Franklin Mendez discuss the SPARTAN-IIs and Covenant threat. November 627 On their way to the Chi Ceti system, the Spartan-IIs accomplish minor missions for three weeks, including putting down rebel factions on Jericho VII and shutting down a black market bazaar near Roosevelt military base.Halo: The Fall of Reach, ''page 125'' (2010 edition) November 27 The Battle of Chi Ceti. The SPARTAN-IIs are delivered to the Damascus Testing Facility on Chi Ceti IV by the . While en route to the planet, ''Commonwealth'' is attacked by the Covenant's ''Unrelenting''. The ''Commonwealth'' manages to damage ''Unrelenting'', allowing the Spartans to escape to Chi Ceti IV.Halo: The Fall of Reach, ''pages 102-113'' Within the UNSC Damascus Materials Testing Facility, the SPARTAN-IIs are introduced and fitted with the MJOLNIR Powered Assault Armor/Mark IV.Halo: The Fall of Reach, ''pages 113-119'' While the Spartans are returning to the ''Commonwealth'', ''Unrelenting'' returns and attacks the frigate. The SPARTAN-IIs board the Covenant ship. They plant Anvil-II air-to-surface missiles at the ship's reactor and detonate them, destroying the shipresulting in the death of Samuel-034.Halo: The Fall of Reach, ''pages 119-130'' December 1 Blue Team attends a funeral for Samuel-034 aboard the . December 3 The UNSC colony Alpha Corvi II is attacked by the Covenant; a large ground force assaults Jamshid, the largest settlement on the planet. Despite having inflicted heavy casualties, an alliance forged by the UNSC and United Rebel Front fails to halt the Covenant invasion, forcing the UNSC to abandon the colony. Ages of Reclamation|Ninth Age of Reclamation begins with the Ascension (ceremony)|ascension of the Hierarchs|High Prophets of Prophet of Truth|Truth, Prophet of Mercy|Mercy, and Prophet of Regret|Regret. They declare that the human race destroyed a vast Forerunner reliquary and are to be exterminated, starting the Human-Covenant War.Halo: Contact Harvest, ''pages 379-384'' Some time before April 22, then-Second Lieutenant Antonio Silva is assigned to command an Orbital Drop Shock Trooper platoon onboard .Halo: The Flood, ''page 134'' (2003 edition) The The Assembly|Assembly holds a tribunal for one of its members, who is believed to have attempted communication with the Covenant.Halo: Reach, ''Data pad '' Later in the year, they discuss the SPARTAN-II program and how it managed to reach operational capacity a year before the Insurrection expanded beyond control.Halo: Reach, ''Data pad 9'' During the evacuation of Harvest, two UNSC Marines, Chris Preston and David Dominguez, are assigned to a freighter which is boarded by Kig-Yar. The two Marines fend off the boarders and protect the ship's passengers, but Dominguez is killed and Preston suffers a major injury to his throat that rendered him mute. The Marines were able to secure a set of Kig-Yar point defense gauntlet|Kig-Yar point defense gauntlets from the ship's boarders, which proved crucial for the development of the MJOLNIR Powered Assault Armor|MJOLNIR Powered Assault Armor's Energy shielding|energy shielding systems. Notes Sources

2526 was a year in the 2520s in the 26th century. Events January 17 At 0930 hours, Chris Preston, undergoing medical rehabilitation on board a refit station, records a message for David Dominguez's parents recounting his sacrifice in securing Kig-Yar point defense gauntlets during the evacuation of Harvest. February 13 Between 0153 and 0314 hours; while surveying the Outer Colonies|outer colony planet Bliss, the encountered a Covenant ships before being destroyed, starting the Battle of Bliss, and the glassing of the planet. February 19 Following it's recovery by the , the ''Accra''s voyage data recorder is accessed and the final event logs are made into a document called the "The Accra Incident". February 24 Doctor Catherine Halsey makes an entry in her Dr. Halsey's personal journal|personal journal in which she ponders the nature of the Covenant and the relationships between its client species. March 1 Preston Cole's Battle Group X-Ray reaches Harvest and the Second Battle of Harvest begins, achieving a Pyrrhic victory. However, the Covenant also claim victory and celebrate through fasting and prayer. The Prophet of Regret broadcasts the executions of "those who failed their duty" in the battle. The Covenant return to Harvest later in the year, leading to a Harvest campaign|five-year campaign for control of the planet. March 4 The covertly observes the Covenant frigate|frigate ''Radiant Arrow'' and its complement of s at the planet Netherop.''Halo: Silent Storm'', ''Chapter 1'' March 5 Twelve Spartan-IIs of Blue Team|Blue, Green Team|Green, and Gold Teams Skirmish over Netherop|infiltrate the ''Radiant Arrow'' in high equatorial orbit over Netherop.''Halo: Silent Storm'', ''Chapter 9'' The frigate is intentionally scuttled by its shipmaster but all Spartans make it off in time.''Halo: Silent Storm'', ''Chapter 3'Halo: Silent Storm'', ''Chapter 4'' March 7 Staff Sergeant Avery Johnson meets with Admirals Preston Cole and Michael Stanforth and Doctor Catherine Halsey aboard the and agrees to be recruited for Operation: SILENT STORM. March 8 The particulars of Operation: SILENT STORM are formalized aboard the .''Halo: Silent Storm'', ''Chapter 5'' March 10 The WINTER CONTINGENCY (protocol)|WINTER CONTINGENCY protocol is enacted by the UNSC. March 23 Insurrectionists bomb civilian spaceport in Troisi City, Lodestone.Halo 4: Forward Unto Dawn, ''Part 1'' March 26 The Jiralhanae Pavium is born on Doisac. April 2 UNSC forces working with ONI agents prevent an attack on New Harmony (city)|New Harmony, Mars. Two Insurrectionists, Christina Rice and James McCann, were disguised as UNSC Army|Army specialists and were stealing weapons for a possible attack. April 6 At 9:15+0 MMT; Intersystem News reported on the Battle of Bliss. April 26 The Battle of Circinius IV takes place: the Covenant launch an assault on Circinius IV, killing almost the entire human population of the planet. SPARTAN-II Program|SPARTAN-II Blue Team is deployed to retrieve survivors from Corbulo Academy of Military Science; only four cadets from Hastati Squad remain alive after the initial assault, three of whom make it to the extraction point and evacuate as the planet is glassed.Halo 4: Forward Unto Dawn April 28 Vice Admiral Michael Stanforth requested for the Office of Naval Intelligence to repurpose all assets to aid the war against the Covenant and to refocus all research on wartime strategy. May 3 Dr. Catherine Halsey devises a new matrix strata with random-access couplers that could theoretically expand an AI's lifespan. Those protocols are authorized by Vice Admiral Michael Stanforth some time later. May 30 The Battle of Mesra takes place as the Covenant invade the Outer colony of Mesra in the Qusdar system with the intent of capturing its vast mining infrastructure; Admiral Preston Cole launches a counteroffensive in a bid to wipe out the invaders, led by Spartan Blue Team.Halo: Oblivion - Chapter 1 June By June, FLEETCOM is unable to consolidate battlefield intelligence before it became inactionable, and stops trying to coordinate core strategy, granting operational autonomy to each battle group. October 21''' The Battle of Alpha Aurigae takes place in the Alpha Aurigae system. Biko is glassed by the Covenant. The Committee of Minds for Security analyze the Covenant's glassing capabilities based on recorded data from prior engagements. They also discuss changing the primary focus of the UNSC Special Forces, with the protection of infrastructure, previously the main focus of the Spartan-IIs, being shifted to the ODST. Later in the year the Committee discuss the possibility of a hypothetical Covenant counterpart to the Assembly and the possibility of contacting it. The Type-32 Rapid Assault Vehicle is first observed by the UNSC. Gallery File:Intersystem News Bliss.jpg File:Outcome of Second Battle of Harvest.png File:Space Battle.png File:HSS full cover.jpg File:CirciniusIV attacked1.jpg File:FUD-Corbulo-Glassed.jpg File:Oblivionart.PNG Sources

2527 was a year in the 2520s in the 26th century. Events March 20 Benjamin M. Nunez is born in New Legaspi, Katagalugan on Mars. April 13 Sarah Palmer is born on Luna. August 2 Theodore Sorel is born in Forseti. Jake Courage begins his career as a photo journalist on Reach. Michael Horrigan is born in Ganymede (city)|Ganymede on Mars. SPARTAN-II program|Spartan John-117 fought alongside an unidentified Orbital Drop Shock Trooper on Green Hills. Around 4 years prior to December 27, 2532 The youngest members of SPARTAN-III Program|SPARTAN-III SPARTAN-III Alpha Company|Alpha Company. are born. Around 12 months after March 9, 2525 SPARTAN-II Program|SPARTAN Soren-066 is assigned to a supposedly temporary desk job on Reach. While stationed at this job, he meets Partch, an insurrectionist who eventually changes Soren's allegiance. Around 10 years after September 2517 Pinar Celik dropped off the record. Around 7 years prior to 2535 Dmitri Zhengs homeworld is glassed while he is away on patrol. Notes Sources

2528 was a year in the 2520s in the 26th century. Events January 30 James Cutter turns down a command position on board the Marathon-class heavy cruiser|cruiser . February 3 Tomas Horvath is born in Alluvion. February 13 The Battle of XI Bootis A takes place, resulting in a United Nations Space Command|UNSC victory. December 5 Edward Buck enlists in the UNSC Marine Corps. December Madrigal is Fall of Madrigal|invaded and Glassing|glassed by the Covenant. Survivors flee to a set of asteroids in orbit above Hesiod, dubbing the worldlets the Rubble. Insurrectionist factions on Talitsa officially disband due to the escalation of the Human-Covenant War. The first SECURITY-class Mjolnir variant was manufactured by Misriah Armory on Mars. The The Assembly|Assembly Assembly Minority|Minority decides to sacrifice remote, low-population colonies in order to determine the Covenant's pattern of operation and plan effective countermeasures based on it. Katrina leaves her homeworld, Eridanus II. The United Nations Space Command Type classification system|classify the , and the . Around 3 years prior to November 7, 2531 Construction Platform 966A is decommissioned and abandoned. Around 3 years after Gage Yevgenny finished ODST training around 2525 The Battle of Hat Yai takes place either this year or late in 2528. Sources

2529 was a year in the 2520s in the 26th century. Events January 11 The Jiralhanae Voridus is born on Doisac. March 15 Jameson Locke is born on Jericho VII. December 11 Doctor Catherine Halsey makes an entry in her Dr. Halsey's personal journal|personal journal regarding how Illegal Entry Protocols had some success in accessing a nonessential subroutine in one Covenant system. Photojournalist Jake Courage wins the International War Photography Prize for ''Screams in Space''. Gregory Ramos is born in the Olympus Highlands on Mars. The Scarab is first observed by Humans. The Shadow is first observed by Humans. A handful of Goblin VS racing cars are manufactured. The United Nations Space Command Type classification system|classify the Type-29 Scarab, the , the , and the . Around 23 years prior to 2552 Future ODST Ava Lang is born sometime this year. Around a year after Madrigal was glassed around December 2528 Juliana is reactivated to help coordinate the Rubble. Around 5 years after 2524 Eric Santiago awakens from a five-year coma and enlists in the UNSC Navy as a Pilot. Around 3 years after Gage Yevgenny finished ODST training around 2525 The Battle of Hat Yai takes place either this year or late in 2528. Notes Sources

2530 was a year in the 2530s in the 26th century. Events January 7 Serina is created by Daedalia Technology and assigned as the 's Artificial Intelligence|AI.Halo: The Essential Visual Guide, ''page 170'' January 30 Catherine-B320 is born in Monastir, New Harmony. SPARTAN-B312 is born in Damask, Jericho VII. February 7 Indrid Lota is born in the human world of Aleria.Halo: Nightfall, ''Halo: Nightfall: ONI: Trade Barriers|ONI: Trade Barriers'' April 12 Owen-B096 is born on Eremus. July 9 Holly Tanaka is born on the human Outer Colony of Minab. August 17 Sergeant John Forge is incarcerated for assaulting Lieutenant Prosser.Halo Wars Timeline Events October 19 Anthony Madsen is born on New Llanelli.Halo 4: The Essential Visual Guide, ''page 23'' October 20 Michael Crespo|Michael "Mickey" Crespo is born in Crisium City, Naniwa, on Luna. November James Cutter, Captain (Navy)|captain of UNSC ''Spirit of Fire'', decided to give his executive officer, Terrence Hood, command of the .Halo: Escalation, ''Issue #5'' November 14 Hudson Griffin is born in Lodestone. December 24 The Battle of Groombridge-1830 takes place, resulting in a costly UNSC victory. December 25 Subject 386 is interrogated by Fleet Admiral Preston Cole and First Lieutenant Richard Lionel Barclay. The interrogation is recorded by the AI Solipsil.''Halo: The Fall of Reach'' (2010), ''Adjunct'' The human colony of Eridanus II is Glassing|glassed by the Covenant Empire|Covenant.Halo: The Fall of Reach Rani Sobeck is born.Axon Media:ILB Brain ninjas.ogg|ILB Brain ninjas.ogg Jake Courage's photo exhibit ''Killing Time'' wins the John Pilger Prize.Xbox.com - ''Jake Courage Exhibition'' (defunct) The The Assembly|Assembly discusses the losses in the Human-Covenant War so far, as well as the possibility of re-terraforming glassed human worlds. To prevent human extinction, they also decide that they must be more open with their actions.Halo: Reach, ''Data pads#Data pad 14|Data pad 14'' Thrust assemblies are replaced on the from the scuttled UNSC UNSC destroyer|destroyer ''UNSC Calcutta|Calcutta''. SPARTAN-II Blue Team shuts down the United Rebel Front's Station Jefferson in the Eridanus system.Halo: Ghosts of Onyx, ''pages 36-37'' Blue Team destroys, captures or otherwise eliminates the URF UNSC destroyer|destroyer ''Origami'' sometime prior to November. Blue Team eliminates a URF high-explosive manufacturing facility at an unspecified location sometime around November. Blue Team disrupts URF activity in Wikipedia:Micronesia|Micronesia and breaks up a saboteur ring on Reach between November of this year and May 2531. Notes Sources

played a pivotal role in the events of early 2531. |century=26th century |previous1=2529 |previous2=2530 |next1=2532 |next2=2533 }} 2531 was a year in the 2530s in the 26th century. Events January 3 Admiral Preston Cole orders the to help the around Harvest. The Planetary Operations Manual#Spirit of Fire January 3rd 2531 Version|Planetary Operations Manual for the Spirit of Fire was amended on this date.Planetary Operations Manual#Spirit of Fire January 3rd 2531 Version|Halo Wars Manual January 30 Ellen Anders|Professor Ellen Anders is recruited by the Office of Naval Intelligence. February The Harvest campaign#Final Liberation of Harvest|final battle of the Harvest campaign is won in space: Admiral Preston Cole's fleet engages the alien warships that have again returned to the Harvest colony. Six years after the planet was attacked, UNSC forces emerge victorious at great cost.Halo Wars February 4 The enters the Epsilon Indi system and arrives back at a glassed and partially frozen Harvest, encountering the Covenant troops of the Fleet of Glorious Interdiction, led by Arbiter Ripa 'Moramee, that are in the process of uncovering a Forerunner Relic (location)|relic on the planet.http://www.gametrailers.com/player/40831.html The ''Spirit of Fire'' discovers the damaged , which has been previously attacked by the Covenant and suffered a critical reactor failure. Sergeant Forge and a team of Extra-vehicular activity|EVA Marines squad rescue the ''Prophecy survivors and destroy the ship to prevent its NAV data from falling into Covenant hands. Captain (Navy)|Captain James Cutter of the makes an entry in his log, reflecting on the five years leading up to this point in the war against the Covenant.2008-14-07. . ''Ensemble Studios. Accessed on 2008-14-07 Serina instructs that production of M41 LAAG weaponry cease on Harvest, Warthogs instead to be upgraded with the M68 Gauss Cannon. Not that it makes much difference as drivers continue to 'splatter' their Covenant enemies, much to the frustration of their maintenance teams.. Accessed on 2009-02-02 Helena Roman is KIA against the Covenant. Captain Cutter sends a message to her family in regards to her death. Professor Anders joins the ''Spirit of Fires crew. Prof. Anders receives some unexpected readings on an EM band and asks a AV-14 Attack VTOL|Hornet squadron en route to Rally Point Baker to investigate. They end up sighting a battalion of Sangheili. Sergeant Forge is assigned to Quadrant 4 to investigate. February 6 Anders writes her father a message detailing her mission to Harvest and the result of her discoveries on the planet, and encodes it as a detailed analysis of Homer's Odyssey. ONI censors miss the cipher completely and the message passes unaltered to her father. February 7 ''Spirit of Fire'' holds service for the crew of the UNSC ''Prophecy''. The crew roster is read despite objections from ONI personnel. February 9 ''Spirit of Fire'' arrives at the planet of Arcadia Battle of Arcadia|during battle, where they meet SPARTAN Red Team. February 10 While investigating the Arcadia Forerunner ruins, Anders is captured by the Arbiter Ripa 'Moramee, forcing the ''Spirit of Fire'' to pursue her captors into unknown space. Serina projects an arrival at Trove|their destination in 312 hours. The ship remains on high alert for the duration, though nonessential crew members are briefly placed in cryo|cryo sleep.Halo Wars Timeline Events February 11 During the Slipspace voyage, Sergeant Forge confronts Jerome-092 over his recommendation to destroy the Covenant ship carrying Professor Anders. The altercation results in a broken chair, a seal malfunction on a bulkhead door, and a stern interruption by Serina. February 14 Serina, knowing that the crew may be on a one way trip, manufactures and delivers fake emails from family members to the crew celebrating Valentine's Day. She uses previous correspondence as a basis for the letters. February 23 Battle of Trove. Medical officers aboard the ''Spirit of Fire'' mistake the Flood for a virus.Halo Wars Timeline Events February 25 ''Spirit of Fire'' escapes Trove thanks to the sacrifice of John Forge. February 26 The ''Spirit of Fire'' crew burn Flood-infected bodies to prevent the virus from spreading in the ship. O'Neil|Chief Medical Officer O'Neil also decides to cancel any study of the Flood. March 1 Chief Engineer Andrew Prescott finishes his assessment of damage to ''Spirit of Fire'' and repairs continue to the hull. The FTL core reactor cannot be replaced and plans to manufacture a spare from base reactor units are deemed unworkable. The decision is made to run the ship on a skeleton crew and place the rest in suspended animation. March 3 Captain Cutter files a report in his log, wondering what Anders experienced as a prisoner of the Covenant. March 4 Anders analyzes the events in the shield world and concludes that Forerunner|the beings who built it knew humans. March 11 Anders is put into cryosleep by Captain Cutter. March 12 Captain Cutter writes five commendations, fourteen family condolence letters, and a note to his wife. April 9 Vedrana Makovich is born in Andesia. May 1 Operation: SMOKING ACES. Spartan-II Blue Team infiltrates Camp New Hope, on planet Victoria, in the 111 Tauri System. General Howard Graves of the United Rebel Front is killed and three FENRIS nuclear warheads are recovered.Halo: Ghosts of Onyx May 24 The movie Lost Colony 3 was due to play on the UNSC ''Spirit of Fire''. May 25 UNSC News Programming was due to play on the UNSC ''Spirit of Fire''. May 26 The movie Desperate Planet 2 was due to play on the UNSC ''Spirit of Fire''. Vice Admiral Cole sends UNSC Transmission 102482-02 to Admiral Michael Stanforth|Harold Stanforth, explaining his thoughts about the importance of protecting Astrogation|navigation data. Included are the Cole Protocol|draft directives Cole previously sent to ONI for review, which he plans to implement within his fleet immediately.Halo: Evolutions - Essential Tales of the Halo Universe, ''The Impossible Life and the Possible Death of Preston J. Cole'' pages 317-320 (2010 Edition, Vol. I) July 12 Feeling she cannot provide her daughter the care she deserves, Catherine Halsey|Dr. Catherine Halsey sends Miranda Keyes|Miranda to live with her father, Lieutenant Jacob Keyes.''Dr. Halsey's personal journal'' October 24 Colonel James Ackerson proposes the SPARTAN-III program to leading members of Office of Naval Intelligence. The project is approved and implemented immediately.Halo: Ghosts of Onyx, ''pages 47-49'' November 7 SPARTAN-II program|Spartans Kurt Ambrose|Kurt-051, Kelly-087 and Frederic-104 are dispatched to investigate Construction Platform 966A for suspected rebel activity. Kurt-051 experiences a thruster pack malfunction and is sent into interplanetary space. The UNSC prowler|prowler and the UNSC frigate|frigate start immediate rescue operations; however, after over 5 hours of searching, nearby Covenant activity forces the search to be terminated, and Kurt-051 is 'officially' declared Office of Naval Intelligence Directive 930|MIA. In actuality the operation was a ruse: Kurt is picked up by Colonel James Ackerson and recruited to train his SPARTAN-IIIs. December 14 After being extracted by Colonel James Ackerson, Kurt-051 is briefed on the SPARTAN-III project and given leadership over its implementation, as well as a new identity as "Kurt Ambrose". December 19 Nicole-458 is born.2005-13-12, . ''Bungie''. Accessed on 2008-03-12 The is first encountered by United Nations Space Command|UNSC forces. Spartan-II Blue Team disrupts Insurrectionist activity in wikipedia:Micronesia|Micronesia and breaks up a saboteur ring on Reach between November 2530 and May of this year. Rear Admiral Cole is promoted to admiral upon his return to Earth and learns that a number of outlying colonies have been destroyed, leaving behind no survivors. He begins to move his fleet around, trying to intercept the invaders. Ground and ship-to-ship battles begin in earnest, raging throughout the Outer Colonies.. Accessed on 2008-03-12 The MJOLNIR Powered Assault Armor/EOD variant enters service.'' The The Assembly|Assembly takes note of a "Flood|third participant" mentioned in the proselytization network during the battle for the Shield World, one which caused "irrational terror" for the Covenant. While presenting the possibility of contacting this third faction, they decide not to, due to the risks involved.Halo: Reach, ''Data pads#Data pad 15|Data pad 15'' The Design pattern|Ket-pattern ''Truth and Reconciliation'' enters service around this year.Halo: Warfleet, ''pgs. 63'' Notes Sources

2532 was a year in the 2530s in the 26th century. Events The Covenant attack Jericho VII this year. Some civilians manage to escape, including orphans who will volunteer for the SPARTAN-III program.Halo: Ghosts of Onyx, ''page 70'' The UNSC Battle of Jericho VII|fights for the planet for the next three years.Halo: The Fall of Reach, ''prologue'' March Dr. Graham Alban, an ONI scientist who worked on the SPARTAN-II program, becomes disillusioned with the ethical implications of the project and commits suicide.''Halo: Mortal Dictata'', Epilogue July 19 From a classified location, Codename: COALMINER sends a AUTOMATED REROUTE UNSC SHIP REG-96667 ABY|transmission to Codename: SURGEON at the Reach FLEETCOM Military Complex|Reach Military Complex, discussing Operation: HYPODERMIC and the beginning of the SPARTAN-III Program.Halo: Ghosts of Onyx, ''page 78'' August 24 Paul DeMarco is born.Halo 4: The Essential Visual Guide, ''page 21'' September 14 Bertold Vettel is born in Earth. December 27 497 recruits arrive at Camp Currahee on Onyx beginning the Spartan-III program under the command of Kurt-051, forming what will later become Alpha Company. The recruits then undergo a test to determine who will be accepted into the program.''Halo: Ghosts of Onyx'', Chapter 6 Battle of Vodin: The Covenant attack the UEG colony world of Vodin; the colony survives, but the UNSC suffers significant casualties in the engagement. Spartan Randall-037 is deemed an "unrecoverable asset" during the Battle of Vodin and is designated missing in action. He would later be considered one of the few SPARTAN-IIs to be ONI Directive 930|truly MIA.Halo: Ghosts of Onyx, ''pages 173-174'' However, he would survive by landing in one of Vodin's oceans and subsequently integrate with the planet's civilian population, later refusing to return to the UNSC. Photojournalist Jake Courage gets into a disagreement with his editor. Although the details remain ambiguous, it is believed that Courage wanted to print a series of pictures from a deadly Grunt attack. His editor refuses on the grounds that they are too graphic, and so Courage leaves the paper and staged his own exhibition. The photos won him critical acclaim and set him up as a well-respected war photographer.Xbox.com - ''Jake Courage Exhibition'' (defunct) Future ODST Victor Ramos is born sometime this year.Halo: Fireteam Raven Notes Sources

2533 was a year in the 2530s in the 26th century. Events January 28 Lucy-B091 is born on Kholo. April 14 Tom-B292 is born on Amadora. November 4 Tedra Grant is born on Arcadia. November 10 Doctor Catherine Halsey records in her Dr. Halsey's personal journal|journal, a theoretical artificial intelligence triumvirate, and that she relocated candidates to the Sanderson Private Hospital on Beta Hydri VI in order to ensure secrecy. December 15 Carlo Hoya is born on Asmara. Between October 21 2532 and October 19 2534 Sadie Endesha was born this year. Around 2 years prior to 2535 Juliana begins to feel the effects of rampancy. Sources

2534 was a year in the 2530s in the 26th century. Events February 10 UNSC declares the UNSC Spirit of Fire|''Spirit of Fire'' and its crew killed in action, from its previous missing in action appointment.Halo: The Essential Visual Guide, ''page 43'' Reasons of this change are kept secret. March 21 Nina Kovan is born in Gilgamesh. June Jersey Morelli is born.''I Love Bees'', Axon Clips, Axon Clips Chapter 10|Chapter 10 - Rani: "The Reluctant Conspirator" July 5 Gabriel Thorne is born on Earth.Halo 4: The Essential Visual Guide, ''page 20'' The Office of Naval Intelligence recommends for the UNSC to implement martial law on Charybdis IX's capital city, Scyllion, but the UNSC is unable to do so, due to the escalating Human-Covenant War.Halo: The Cole Protocol, ''page 107'' Photojournalist Jake Courage wins the MoH lifetime achievement award for ''Flies on Flesh''.http://www.xbox.com/en-GB/games/h/halo3/jakecourage.htm Sources

2535 was a year in the 2530s in the 26th century. It was a turning point in the Human-Covenant War. With the destruction of Jericho VII, most major Outer Colonies had been destroyed. In order to protect Earth and the remaining colonies, the United Nations Space Command Emergency Priority Order 098831A-1|Cole Protocol was established by military order. Human ships must, when forced to withdraw, not move on to a colony-bound vector, even if that means jumping without proper navigational calculations. If blind jumps are not possible, the ship's commanding officer must order a self-destruction sequence if capture is imminent. In addition, it is also imperative that the shipboard Artificial Intelligence|AI construct's data core not fall into Covenant hands; thus, part of this protocol involves either the removal or destruction of the ship's AI in extreme situations. Additionally, no captured Covenant ships or technology may be brought back to a human planet without being checked extensively for surveillance devices. Events January 29 The Sangheili Tul 'Juran is born on Rahnelo. February 12 Jericho VII is glassed by the Covenant. John-117 and the other SPARTAN-II Program|SPARTANs escape aboard the .Halo: The Fall of Reach, ''page 8'' (''"Their lateral lines brightened with plasmathen discharged and rained fire down upon Jericho VII."'') December 25 Bonita Stone is born in Komoya. Janissary James is born around this time. The MJOLNIR Powered Assault Armor/AA variant is introduced. The helmet is eventually adopted by the UNSC Army's airborne units.Halo: Reach, ''Armory description'' Lieutenant Jacob Keyes visits Chi Rho and is assigned to the stealth frigate . Sangheili Zealot|Zealot Thel 'Vadamee is appointed Shipmaster of the ''Retribution's Thunder'' and elected Kaidon of Vadam. Battle of Charybdis IX - Charybdis IX is Glassing|glassed. Battle of the Rubble and the Battle of Metisette - The asteroid habitat known as the Rubble is used to destroy the Kig-yar settlement, the Redoubt, on the surface of Metisette. Most of the Rubble's inhabitants escape on the Exodus Project|Exodus asteroid, and head to the 18 Scorpii system. Admiral Preston Cole skip-promotes Jacob Keyes to commander for his actions in the battles. The ''Fleet of Particular Justice'' is formed following a restructuring of the Covenant Navy. Thel 'Vadamee is made Shipmaster of a Covenant cruiser|cruiser in the new fleet. The The Assembly|Assembly, acknowledging the technological inferiority of the humans to the Covenant, discusses fully exposing themselves to their creators and becoming active participants in the war.Halo: Reach, ''Data pads#Data pad 16|Data pad 16'' Sources

2536 was a year in the 2530s in the 26th century. Events January 20 Olympia Vale is born on Luyten. June 1 Covenant forces begin to swarm into the Inner Colonies. For several years the war falls into a pattern: the UNSC wins isolated battles, typically during ground operations, but at a horrible cost. In space, the humans are losing at a precipitous rate, and one by one, the Inner Colonies fall. October-November SPARTAN-III Alpha Company graduates and is deployed into combat.Halo: Ghosts of Onyx, ''page 81'' Hayabusa Powered Assault Armor is developed by Facility RKD and accepted by the UNSC Ordnance Committee late in this year.Halo 3, ''Hayabusa armor description'' Catherine-B320's mother dies of cancer. An Mamore insurrections|insurrection on Mamore, and several conflicts in the Bonanza asteroid belt and the Far-gone are fought either late in this year or 2537. SPARTAN-III Alpha Company distinguishes themselves in these engagements. Sources

2537 was a year in the 2530s in the 26th century. Events January 1 Serina awakens engineering specialist Violeta Maldini in order to perform operations and maintenance on the . Specialist Maldini is attacked by a Flood Pod infector and is Outbreak on the UNSC Spirit of Fire|overtaken by the parasite. Serina locks the resultant combat form in Cryo-bay Foxtrot 7. January 2 Serina notes that while the Flood form does not appear to be experiencing suffering, it does seem like it is hungry. January 3 The combat form begins to morph to become more like a carrier form. January 4 The Flood disperse new Pod infectors and overtake more crew members in an attempt to break quarantine. Spartan-II program|Spartan SCPO Jerome-092 is awoken and exterminates all infected personnel, eliminating the Flood presence on the ''Spirit of Fire''. After the event, Serina starts her final dispensation, killing herself. March 19 The first version of Smart AI Kalmiya is activated. July 27 Operation: PROMETHEUS. Most of Spartan-III Alpha Company destroys a Covenant shipyard on asteroid K7-49, but all 300 of the participating Spartans are killed in the process. July 30 Kurt discovers the fate of Alpha Company and selects the candidates for Beta Company.Halo: Ghosts of Onyx, ''page 88'' December 8 The Sangheili Dural 'Mdama is born to Jul 'Mdama|Jul and Raia 'Mdama on Sanghelios. An Mamore insurrections|insurrection takes place on Mamore in either 2536 or 2537, resulting in the insurrectionist forces being put down by the SPARTAN-III program|Spartan-IIIs of SPARTAN-III Alpha Company|Alpha Company.Halo: Ghosts of Onyx, ''page 81'' Conflicts in the Bonanza asteroid belt and the Far-gone colony platforms are fought in either 2536 or 2537. The Battle of New Constantinople is fought in 2537.Halo Encyclopedia (2009 edition), ''page 36'' (2011) The Battle of Leonis Minoris ends in a pyrrhic UNSC victory as two of the Leonis Minoris colonies are glassed and a third saved.Halo: Evolutions, "The Impossible Life and the Possible Death of Preston J. Cole", ''page 470'' The Battle of New Harmony takes place, resulting in a rare UNSC Navy victory and the discovery of Covenant shipyard K7-49.Halo Encyclopedia: The Definitive Guide to the Halo Universe, ''page 272'' (2011)Halo: Ghosts of Onyx, ''pages 83-86'' The 2nd class of Spartan-IIs are conscripted. Of which are Yasmine Zaman and Nicole-458. Sources

2538 was a year in the 2530s in the 26th century. Events September 26 Olivia-G291 is born on Miridem. December 23 Mark-G313 is born on Veltun. Jake Courage wins the International War Photography Prize for his exhibit ''Dead on Arrival''.Xbox.com - ''Jake Courage Exhibition'' (defunct) The S-2 Traxus Cargo Transporter is first designed.Halo: The Essential Visual Guide, ''page 73'' A deadly outbreak of asteroidea merozoite kills thousands on the UEG colony of Barugi. Sources

2539 was a year in the 2530s in the 26th century. Events March 5 Ash-G099 is born on Alluvion. Kholo is Battle of Kholo|attacked and Glassing|glassed by the Covenant.Halo: Evolutions (Volume II), "The Return", ''page 310'' ("Twenty years" before either 2558 or 2559) Spartan-III SPARTAN-III Beta Company|Beta Company begins training during this year or in 2540#January|January 2540. Team X-ray of Beta Company vanishes during a training exercise on Onyx in 2539 or early 2540. The area is dubbed "Zone 67", and is subsequently closed off by ONI.Halo: Ghosts of Onyx, ''page 94'' Details of the Barugi Incident are made part of the public record.''Halo: Retribution'', ''page 210'' Notes Sources

2540 was a year in the 2540s in the 26th century. Events May 9 Lieutenant Commander Fhajad-084 published an article on Slipspace|slipspace physics that was featured within the later UNSC Astrophysics Journal 034-23-01. This paper was used 12 years later in 2552 by at the time Commander Jacob Keyes when he realized Covenant warships were inbound for Sigma Octanus IV.''Halo: The Fall of Reach'', Chapter 16 July 12 Operation: GUARDIAN LANCE takes place on Jericho VII, and results in several Covenant artefacts being captured by the UNSC for display inside SWORD Base. September 9 Taylor Miles|Taylor "Dutch" Miles enlists in the UNSC Marine Corps. Around his sixth birthday on July 5, Gabriel Thorne moves to the city of New Phoenix to live with Thorne family|his grandparents.''Halo: Escalation'' - Halo: Escalation Issue 7|Issue #7 Sources

2541 was a year in the 2540s in the 26th century. Events March 12 Kojo Agu|Kojo "Romeo" Agu enlists in the UNSC Marine Corps, at the minimum age of 16. May 9 The Dumb AI Auntie Dot is activated. June 27 Vice Admiral Preston Cole|Preston J. Cole records an entry in his Cole's personal log|personal log, describing the strain that the toll of fifteen years of hard fighting had placed on him.Halo: Evolutions - Essential Tales of the Halo Universe, ''The Impossible Life and the Possible Death of Preston J. Cole'' pages 320-322 (2010 edition, Vol. I) August 24 SPARTAN-III SPARTAN-III Beta Company|Beta Company undergoes one of a series of exercises intended to select candidates for further training. Using unconventional tactics, the Spartans of Team Foxtrot appropriate M202 XP machine guns along with weapons and armor from several waves of their instructors before being eventually ordered to stand down by Kurt Ambrose|Lieutenant Ambrose and Franklin Mendez|CPO Mendez.Halo: Ghosts of Onyx, Chapter 9 The game Hyperforce is enjoyed by civilian children. Axon Clips Chapter 6 Rion Forge's grandfather dies of Boren's Syndrome.Halo: Smoke and Shadow, ''page ??'' The UEG colony of Barugi is quarantined following a Barugi Incident|deadly outbreak of asteroidea merozoite three years prior. A series of thermonuclear Hornet mines are deployed around the planet to prevent the spread of the disease to other colonies. All UEG and UNSC vessels are instructed not to approach the planet. Sources

2542 was a year in the 2540s in the 26th century. Events January 20 The Sangheili Asum 'Mdama is born to Jul 'Mdama|Jul and Raia 'Mdama on Sanghelios. August 24 SPARTAN-III Beta Company is sent on an training exercise on the planet Onyx. The UNSC abandon Emerald Cove due to the threat of a Covenant invasion.''Halo: First Strike'', pg. 220 (2003 edition); pg. 266 (2010 edition) The MJOLNIR Powered Assault Armor/Mark V begins development this year.''Halo Encyclopedia (2009 edition)'', pg. 97 (2011 edition) Alluvion is Glassing|glassed by the Covenant. Molly Patel is born on Paris IV.''Halo: Legacy of Onyx'', pg. ?? Kareem El-Hashem is born on Luna. A Covenant force raids Camber and successfully destroys a UNSC fleet depot.''Halo Infinite Season 2 Lone Wolves Intro Cinematic|Halo Infinite - Season 2: Lone Wolves Intro Cinematic'', ''Halo Infinite'' Sources

2543 was a year in the 2540s in the 26th century. Events February Preston Cole records his final entry in his Cole's personal log|personal log.Halo: Evolutions - Essential Tales of the Halo Universe, ''The Impossible Life and the Possible Death of Preston J. Cole'' page 326 (2010 edition, Vol. I) March 6 The Battle of 18 Scorpii takes place. UNSC forces are saved by Insurrectionists.Halo: Evolutions - Essential Tales of the Halo Universe, "The Impossible Life and the Possible Death of Preston J. Cole", ''page 473 (2009 edition)'' March 9 Vice Admiral Preston Cole contacts Admiral Dale Kilkin at UNSC Central Command Reach Logistics Office requesting a series of requisitions, transfers and favors.Halo: Evolutions - Essential Tales of the Halo Universe, "The Impossible Life and the Possible Death of Preston J. Cole", ''page 475 (2009 edition)'' March 18 Dr. Catherine Halsey finds her journal after it being lost for almost 6 years.Dr. Halsey's personal journal, ''March 18, 2543'' April 11 The Battle of Psi Serpentis starts with 's reconnaissance. April 18 The Battle of Psi Serpentis, later known as Admiral Cole's Last Stand, takes place.Halo: Evolutions - Essential Tales of the Halo Universe, "The Impossible Life and the Possible Death of Preston J. Cole", ''page 476 (2009 edition)'' Summer of 2542 The is assigned to the planet Reach. July 28 A day of mourning is proclaimed by the UNSC following the apparent death of Admiral Cole.Halo: Evolutions - Essential Tales of the Halo Universe, "The Impossible Life and the Possible Death of Preston J. Cole", ''page 483 (2009 edition)'' Notes Sources

2544 was a year in the 2540s in the 26th century. Events Operation: GREY VEIL takes place on Heian. Sheila-065 is killed by Thel 'Lodamee in the Battle of MiridemHalo: Ghosts of Onyx, page 173 - the battle takes place concurrently with GREY VEIL. Dr. Catherine Halsey is captured by Covenant forces who attempt to flee the system, prompting Office of Naval Intelligence|ONI to deploy a team of SPARTANs on a Operation: WARM BLANKET|rescue mission. After two years of Battle for Alluvion|battle against the Covenant, Alluvion's citizens have either died or fled. The colony is abandoned. Construction of the begins. The Corner, a store in the West Market of Mombasa, opens. Sources

2545 was a year in the 2540s in the 26th century. Events January 10 Draco III is Battle of Draco III|invaded by the Covenant and its civilian population is massacred.Halo: The Essential Visual Guide, ''page 26'Halo: New Blood'', Chapter 2 Early February Edward Buck requests a transfer for the Orbital Drop Shock Troopers in response to the loss of his homeworld, Draco III. February 27 Edward Buck is transferred to the ODSTs by UNSC High Command. May After a long drawn out battle, the Battle of Actium ends in a UNSC defeat and Actium is glassed., Hero-Courage May 10 During the Battle of Actium, Colonel Akono Menteith delivers a stirring speech, rallying the men and women of the 53rd Armored Division to perform great feats of heroism. May 30 A conversation takes place between Franklin Mendez and Kurt-051, regarding the reassignment of some members of SPARTAN-III Beta Company, including SPARTAN-B312 and Catherine-B320, to non-combat roles. July 3 Operation: TORPEDO commences. SPARTAN-III Program|Spartan-IIIs of Beta Company launch an assault against a Covenant Empire|Covenant refinery on Pegasi Delta.Halo: Ghosts of Onyx, ''pages 13-27'' 298 of the 300 SPARTAN-IIIs are killed during the assault, with Tom-B292 and Lucy-B091 as the only survivors.Halo: Ghosts of Onyx, ''page 27'' July 9 The 330 recruits of the SPARTAN-III Gamma Company start their training. September Edward Buck takes shore leave on Castellaneta in orbit over Saturn, where he meets ONI operative Veronica Dare for the first time.''Halo: New Blood'', Chapter 6 September 16''' Class-II Spartan-IIs undergo augmentations. Yasmine Zaman has her fourteenth birthday.Axon Clips Chapter 11 At some point during her augmentations, Yasmine Zaman dies from complications. Her brain is later donated for the creation of the Artificial Intelligence|AI known as "Melissa (AI)|Melissa". Richard Lash transfers to the Prowler Corps. Natalie Aiken is born on Vodin. Her mother dies during childbirth, leaving her father, Randall Aiken, to raise her. Mason Hundley's father dies in the Procellarum basin on Luna, where his skiff ran into severe winds during a retrieval maneuver. Sources

2546 was a year in the 2540s in the 26th century. Events Sargasso is Battle of Sargasso|invaded by the Covenant. The Type-46 Infantry Support Vehicle is first encountered by United Nations Space Command personnel during the battle.Halo: The Essential Visual Guide, ''page 186'' September 21 Led by Edward Buck, Alpha-Nine conducts a military operation against the Covenant on the colony of Sargasso. New Llanelli is Battle of New Llanelli|attacked by the Covenant, who are victorious and glass the planet.Halo: Glasslands, ''page 133'' Lydus, a Jiralhanae Chieftain, is recorded to have left the Oth Sonin system for the first time. Sources

2547 was a year in the 2540s in the 26th century. Events January 10 Caleb Aagard and Nerina Vale, alongside their daughter Olympia Vale|Olympia, would have a family camping trip to Hoodoo Gorges, on Luyten. However, both Caleb and Nerina decide to get divorced after the trip. January 20 Caleb's and Nerina's divorced is completed, coincidentally on Olympia's eleventh birthday. February 9 The Stalwart-class light frigate is formally commissioned into service, the last of sixteen such vessels built at Anchor 9. May 21 Office of Naval Intelligence#Sections#Section II|ONI Section Two publicly unveils the SPARTAN-II program in order to boost morale during the Human-Covenant War. Because each super soldier is said to have killed thousands of Covenant troops, many consider the Spartans to be the stuff of legend, unless having encountered one. The existence of the SPARTAN-III program remains confidential.Halo: Ghosts of Onyx, ''page 139'' July 7 The Rookie enlists in the UNSC Marine Corps. September 4 The UNSC frigate ''UNSC Tripping Light|Tripping Light'' is dry-docked for repairs. Dr. Catherine Halsey uses the ship's Shaw-Fujikawa Translight Engine|Slipspace drive in an experiment to build an AI housing fractal within Slipspace.Dr. Halsey's personal journal, ''September 4, 2547'' While the test is eventually a failure, the The Assembly|Assembly takes note of this as an incredible scientific breakthrough and even discusses the possibility of permanently moving into such construct to escape in case humanity were to lose the war.Halo: Reach, ''Data pads#Data pad 17|Data pad 17'' The colony Skopje is Battle of Skopje|attacked and subsequently glassing|glassed by Covenant forces.Halo: Evolutions - Essential Tales of the Halo Universe, ''Dirt'' An ONI patrol drone records a violent meteor collision in an unspecified space site. A UNSC research facility is later established in this location to study the impact event.Halo 4, multiplayer map ''Impact'' description Kerstin Sentzke, Edvin Sentzke's daughter and Staffan Sentzke's granddaughter, is born.Halo: Mortal Dictata, ''page 105'' The secret FSS-1000 Sabre|Sabre Project is developed.Halo: Fleet Battles, ''Core Rulebook - page 125'' Sources

2548 was a year in the 2540s in the 26th century. Events June 4 Michael Crespo|Michael "Mickey" Crespo enlists in the UNSC Marine Corps. June 6 Benjamin Nunez enlists in the UNSC Marine Corps.''Halo: Landfall'', Halo: Arms Race Roland Huffman and Niraj Shah join the United Nations Space Command armed forces. The M392 Designated Marksman Rifle, having been steadily phased out in favor of the BR55 Service Rifle for some time, is replaced by the BR55 Heavy Barrel Service Rifle in all branches but the UNSC Army|Army. The Covenant launch their first attack on the Outer Colony of Meridian; the UNSC are successful in repelling this attack. The MJOLNIR Powered Assault Armor/CQC variant enters service.Halo: Reach - ''Armory'' The Battle of Meridian takes place. Sources

2549 was a year in the 2540s in the 26th century. Events Before March 28 The Battle of Algolis occurs. May 21 Dr. Catherine Halsey Flash-cloning|flash clones herself in order to create the Cognitive Impression Modeling|seed brain for the AI Cortana, infringing the UN Colonial Mortal Dictata Act in the process.Halo: Reach, ''Dr. Halsey's personal journal'' August 26 At 22:43, a civilian engineer records "Log Entry 1" as part of Project MAGNES, where she does test 1.0. August 27 At 23:18, a civilian engineer records "Log Entry 4" as part of Project Magnes, where she does test 4.0. August 29 At 10:37, a civilian engineer records "Log Entry 17" as part of Project Magnes, where she does conductive transfer test 17. September 1 At 02:18, a civilian engineer records "Log Entry 39" as part of Project Magnes. September 3 At 13:22, a civilian engineer records "Log Entry 44" as part of Project Magnes. September 6 At 16:55, a civilian engineer records "Log Entry 57" as part of Project Magnes. September 9 Fall of Arcadia. The Covenant glassing|glasses Arcadia. At 15:43, a civilian engineer records "Log Entry 63" as part of Project Magnes. September 10 At 12:18, a civilian engineer records "Log Entry 70" as part of Project Magnes, where she does test 70. At 17:33, a civilian engineer records "Log Entry 72" as part of Project Magnes, where she does test 72. September 12 At 23:43, a civilian engineer records "Log Entry 75" as part of Project Magnes. September 14 At 13:38, a civilian engineer records "Log Entry 78" as part of Project Magnes, where she does test 78 and it succeeds. October 16 The civilian log entries in regards to Project MAGNES are compiled and entered into the UNSC Archives. November 7 Cortana is created from one of Dr. Catherine Halsey's flash-cloned brains.Dr. Halsey's personal journal December 15 A mandatory psychiatric reevaluation for the members of NOBLE Team takes place. Jun-A266 is noted as having "an unhealthy emotional detachment in regards to the consequences of his actions". Paris IV is Siege of Paris IV|attacked. According to ONI documentation, Staff Sergeant Avery Johnson uses a box of plasma grenades to buy time for his Marines to evacuate, receiving a twelve-hundred-rad cumulative dose of radiation and later being diagnosed with Boren's Syndrome, which in the future will save his life from Flood infection on Installation 04 and onward.Halo: The Fall of Reach However, the Borens' Syndrome story involving Johnson is a hoax, a fabrication by ONI to cover his participation in the much earlier ORION Project.Halo Graphic Novel, Page 122|Halo Graphic Novel, ''page 122'' The 2549 edition of the Hog is released either this year or late in 2548. The Covenant recall their standard model to update its design, fitting a Pek-pattern plasma cannon|Type-52 DESW on a ring mount. Sometime during this year, the SPARTAN-II program is announced to the public,Halo: The Fall of Reach, ''page 230'' (2001) and any Spartan who dies is to be listed as either Missing In Action or Wounded in Action, to give the illusion that Spartans never die in accordance with the Office of Naval Intelligence Directive 930.Halo: First Strike, ''page 249'' (2003) Because the unidentified engineer took on Project MAGNES with the hope that it could be used by John-117, it is likely that the SPARTAN-II program's public unveiling occoured prior to August 26. Sometime prior to August 26, a civilian engineer submits schematics to the UNSC as part of Project MAGNES, illustrating a concept for a device allowing for the rapid mass manipulation of heavy objects. The UNSC rejects the proposal, leading to the engineer deciding to build a prototype of the Grappleshot herself. The Strident-class heavy frigate is introduced. Notes Sources

2550 was a year in the 2550s in the 26th century. Events January The Banished raid the UNSC's Carter Guard Armory, with Atriox personally killing a group of Orbital Drop Shock Troopers defending it with his bare hands. Helmet recorder|Helmet cam footage from Sergeant B. Wright, an ODST killed in the raid, provides the Office of Naval Intelligence with its first look at Atriox, who is identified to agents by a captured Banished Unggoy.''Halo Wars 2'', Phoenix Logs Rise of Atriox I February 11 Dr. Catherine Halsey determines that Cortana, by disabling the viral termination code in her matrix, may be able to overcome the Artificial Intelligence|AI's typical seven-year life cycle. February 15 ONI agents 'D' and 'S' review the helmet cam footage from Sergeant B. Wright, an ODST killed in the raid on the Carter Guard Armory six weeks prior. March 19 The is refitted for service near the Zeta Doradus system.''Data Drop'', #5 April 5 Miranda Keyes is awarded the Silver Star and promoted from Lieutenant to Lieutenant Commander in a ceremony in downtown Quezon on Reach.''Halo: Reach Limited Edition'', Intersystem News, LCDR Miranda Keyes Awarded Silver Star April 6 Intersystem News released their report of the event. Dr. Halsey also wrote down in her journal how she felt about Miranda's career up until that point and about the ceremony.''Dr. Halsey's personal journal'', April 6, 2550 June 3 Professor Laszlo Sorvad starts his archaeological survey of a meteorite debris field near Visegrad, Reach.''Dr. Halsey's personal journal'', June 3, 2550 August 23 The construction of Cairo Station (station)|Cairo Station begins.''Halo: Warfleet'', p. 31 November 17 Seven Covenant-held locations have been raided by the Banished by this time, the most recent of which was a forward outpost meant to be attacked as part of Operation: SLOW DIVE.''Halo Wars 2'', Phoenix Logs Rise of Atriox II November 23 The Official Secrets Act is passed.''Dr. Halsey's personal journal'', November 23, 2550 At some point after July 9, Minab is Glassing|glassed by the Covenant.''Halo: Escalation'', Halo: Escalation Issue 17|Issue #17 Lieutenant Wagner suffers severe plasma burns to a third of his body. A meteorite impact crater was discovered near Visegrad. Office of Naval Intelligence|ONI noted the significance of the site and had many researchers analyzing it. However, no forced relocation of nearby residents was enacted.''Dr. Halsey's personal journal'' The Battle of Gamma Pavonis VII occurs. The Battle of Ballast occurs. Ballast ultimately escapes being glassed. Blue Team is deployed to the ice Natural satellite|moon Umagena to capture Insurrectionist Hector Nyeto. However he isn't actually there. Sources

2551 was a year in the 2550s in the 26th century. Events January 24 UNSC Smart AI|"smart" artificial intelligence Iona begins service. February 19 As part of Project CHRYSANTHEMUM, the SPARTAN-IIIs of Gamma Company begin their week-long augmentation process on the in Sector K-009 folllowing its departure from Reach.Halo: Ghosts of Onyx, ''page 101''Dr. Halsey's personal journal, ''February 20, 2551'' February 27 The ''Hopeful'' returns to Reach following the Spartans' augmentation procedures.Dr. Halsey's personal journal, ''February 27, 2551'' Before May, the ''Enduring Conviction'', led by Let 'Volir, faces against the UNSC. During the battle, the ''Enduring Conviction'' performed impressive evasive maneuvers.Halo Wars 2 - ''Phoenix Logs: Rise of Atriox III'' May 8 Catherine Halsey|Dr. Catherine Halsey undergoes the Hemley & Aubourn Behavior Analysis; the results make ONI increasingly wary about her reported unreliability.Data Drop/HABA|Data Drop 3 November 24 MJOLNIR Powered Assault Armor/Mark V (B)|Mark V[B], the initial production model of the MJOLNIR Powered Assault Armor/Mark V|Mark V MJOLNIR armor,Halo Encyclopedia (2009 edition), ''page 94'' (2011 edition) enters service. December 5 Covenant activity was witnessed at Lethbridge Industrial's Lethbridge Combat Fields on Concord. December 6 At 0720, as part of Operation: GYPSUM UNSC forces, including Sergeant Sigrid Eklund and M9 Wolverines, clear out the Caravelle province on Concord. Sigrid Eklund reports to Commander Renna regarding the events of Operation: GYPSUM indicating its success. On Concord; Operation: SHARP ANGLE is noted as confirmed, and Operation: OFFSET EYE is noted as pending. December 12 Operation: OFFSET EYE is accomplished by NOBLE Team on Corcord's Hinterlands region. Rosenda-A344 is transferred to other clandestine operations, while the rest of NOBLE Team is tranferred to Fumirole. December 22 The Car & Pilot Magazine releases its Car & Pilot: December 2551 Edition|December 2551 Edition. This includes a review of the new Civilian Warthog|2553 edition of the Civilian "Hog". Pawel Czernek and John Tippett enter active service with the UNSC UNSC Marine Corps|Marine Corps. Concord is Defense of Concord|attacked by the Covenant; the colony survives largely intact. The MJOLNIR Powered Assault Armor/Venator|Venator MJOLNIR Powered Assault Armor|MJOLNIR [GEN1] variant gains prominence in the attack.Halo 4, ''MJOLNIR/Venator armor description'' Gray Team is deployed on a mission against a Covenant facility within humanity's former territory. The Battle of Meridian ends. Meridian is glassed and Chalybs Defense Solutions facilities on the moon are abandoned. The Covenant discovers a Luminary on Meridian that leads to Earth.Halo 2: Anniversary, ''Terminal (Halo 2: Anniversary)|Terminal 1'' The begins construction.Halo Mythos, ''page 82'' Veta Lopis' mother dies.Halo: Last Light, ''page 365'' (Google Play edition) The Combat knife|M11 combat knife is manufactured by the Watershed Division.''Halo: Official Spartan Field Manual'', p. 182 Sources

File:Reach Galactic Cup.jpg|thumb|Banners for celebrating the event located in the New Alexandria Concourse. The 2552 Reach Galactic Cup was a sporting event to be held in 2552 on the UNSC Inner Colonies|colony of Reach. More than likely, the event was never held due to the Fall of Reach.Halo: Reach, campaign level ''Exodus'' Trivia In ''Exodus'', there are four red posters advertising for the event. The event could be a reference to modern-day sporting events, especially the Wikipedia:FIFA World Cup|FIFA World Cup, considering that humanity has yet to reach a "galactic" stage. List of appearances ''Halo: Reach'' Sources Category:Sporting events

2552 was a year in the 2550s in the 26th century. It was the ultimate year of the Human-Covenant War, during which the humans of the United Nations Space Command nearly saw utter defeat and extinction, though the tide turned, and with significant help from the Sangheili, they managed to win the war. The Covenant were at the peak of their power and reach in 2552, with Siege of the Inner Colonies|major assaults on the human Inner Colonies and an invasion followed by a Battle of Earth|prolonged engagement on their home planet, Earth.Halo 2, campaign level ''Cairo Station''Halo: Ghosts of OnyxHalo 3, campaign level ''The Storm'' During the Battle of Installation 04|battle at Installation 04, the galaxy found its first large outbreak of the Flood threat in over a hundred thousand years.Halo: Combat Evolved, campaign level ''343 Guilty Spark (level)|343 Guilty Spark''Halo: Combat Evolved, campaign level ''The Library'' Over one month later, an even larger outbreak occurred at Installation 05.Halo 2, campaign level ''Sacred Icon'' The war finally drew to a close at Installation 00, known more commonly as the Ark, with the humans and Sangheili attempting to kill the High Prophet of Truth, before he could activate the remaining Halo installations.Halo 3, campaign level ''The Ark (level)|The Ark''Halo 3, level ''The Covenant (level)|The Covenant'' The alliance was successful in their mission against the Covenant and ended the 27 year long war. Events The Battle of Beta Eridani takes place when the Fleet of Valiant Prudence invades the system. The UNSC is defeated and Rho 'Barutamee takes control of several Forerunner artifacts that lead him to Epsilon Eridani system|another system. January 8 A team of ODST's (Including Kojo Agu and Taylor H. Miles) descend onto Ariel (a small science colony) in response to a distress call on the planet in Operation: FIRESIDE.Halo: Helljumper Issue 1 page 3 "''UNSC Operation 2552-JA-8 Codename: Fireside''" February Insurrectionists on Harmony disable the planet's primary communications relay and steal two drydocked freighters.Halo: Reach, campaign level ''Noble Actual'' March 9 An entry is recorded in a UNSC Archive regarding a UNSC Excavation site headed by BXR Mining Corporation being bombarded by the Covenant. The miners managing to get the ore being mined to the surface before the mine totally collapsed. April 22 Battle of Fumirole: Noble Team member Thom-A293 destroys a but kills himself in the process, and Catherine-B320 loses her arm. She subsequently receives a artificial limb|robotic prosthetic. Unknown Date The finishes construction.Halo: The Fall of Reach, ''page 139'' May 10 SPARTAN-B312 takes part in a Mamore insurrections#2552|counter-insurgency operation on Mamore. The Spartan's skills as a FSS-1000 Sabre|Sabre pilot are exhibited during the op, prompting Colonel Urban Holland to have him transferred to Noble Team. May 14 through May 19 UNSC forces in the Earth Defense Coordination Zone are placed at maximum readiness levels and all warships with MAC|magnetic accelerator cannons are self-deployed or towed to rally points. ''Cairo Station (station)|Cairo Station'' is established as flag headquarters. May 24 Smart AI Gabriela is activated. Unknown date The Battle of New Jerusalem takes place sometime this month or the 2552#August|next.Halo: Evolutions - Essential Tales of the Halo Universe, "Dirt", ''page 153'' The 26th Marine Expeditionary Force is nearly wiped out, leaving the Rookie as one of the few survivors. After July 5 Gabriel Thorne single-handedly saves his entire platoon in the Battle of Criterion. July 17 The Slipspace monitoring probes from Remote scanning outpost|Remote Scanning Station ''Archimedes'' at the edge of the Sigma Octanus system encounter the Covenant ships sent to attack Sigma Octanus IV. The is tasked with patrolling the Sigma Octanus star system. The Battle of Sigma Octanus IV begins. July 18 The UNSC win a victory during the battle at Sigma Octanus IV. Commander Jacob Keyes, of the , plays a critical role in this success when he devises the Keyes Loop maneuver. Keyes is subsequently promoted to Captain (Navy)|Captain by Vice Admiral Michael Stanforth. Unknown to the UNSC, the Covenant place a spy probe|tracker on the hull of the ''Iroquois''. The importance of Reach to the UNSC is revealed to the Covenant when the ''Iroquois'' returns to that world. Vice Admiral Stanforth messages the director of the Office of Naval Intelligence, Margaret Parangosky|Admiral Margaret Parangosky, with information on the battle at Sigma Octanus IV, as well as the ongoing progress of Operation: BRAVADO. July 23 The Covenant deploy the Fleet of Valiant Prudence to sever Reach's out-system communications and search for Forerunner artifacts. This is the first stage of the Covenant's Fall of Reach|invasion of the planet. Noble Team finds and stops a pair of Insurrectionist SCI combatants attempting to hijack a supply transport. Fireteam 3 Charlie, along with other special warfare fireteams under command of Colonel Holland, are sent to investigate the areas around Longhorn Valley and Visegrad after contact with the Visegrad Relay|comms relay in Visegrad is lost. July 24 Two months after the death of Thom-A293, SPARTAN-B312 joins Noble Team as Noble Six. Noble Team is sent by Colonel Holland on a mission to investigate the downed Visegrad Relay. Noble Team discovers the Covenant's presence on Reach for the first time at Visegrad Relay. Planetary directive WINTER CONTINGENCY (protocol)|WINTER CONTINGENCY is declared. July 26 SWORD Base, an ONI research facility on Reach, comes under attack by an . The UNSC Army with the help of Noble Team successfully repel the attack and the corvette is destroyed by orbital support. Unknown date After discovering Reach, the Covenant move on to glass the other planets in the system, including Tribute, resulting in the prolonged Battle of Tribute. During the Battle of Tribute, SPARTAN-II Team Black is sent to Verge to destroy a Covenant Beacon supplying Helium|helium-3 to the ships laying siege on Tribute. The team successfully destroys the beacon.Halo: Evolutions - Essential Tales of the Halo Universe - ''Blunt Instruments'' After the mission on Verge, Vice Admiral Alexander Reaves assigns Fireteam Black to Operation: BLOWBACK, a covert mission in Covenant-occupied space. UNSC Long Time Coming|Their ship, as well as a Clarity of Faith|Covenant carrier, crash-land on an Unnamed Moon|unknown moon, igniting the Battle of Line Installation 1-4. Margaret-053 is captured by Forerunner Gatherers. Team Black and the Covenant forces on the moon enter into a reluctant alliance to rescue the Spartan. Fireteam Black encounters the Forerunner monitor 686 Ebullient Prism en route to rescuing Margaret-053. The monitor briefly causes rifts between the team to prevent them from rescuing their comrade. Margaret, however, escapes anyway, aided by Reff 'Talamee, and the rest of Team Black stop fighting amongst themselves. Team Black manages to enter the control room of Line Installation 14, eventually destroying 686 Ebullient Prism with the installation's main gun; they also succeed in destroying the entire Covenant fleet. Beta Gabriel is captured by a pack of Jiralhanae under the command of Chieftain Parabum. A majority of the sparse human population is either taken prisoner or killed, including ONI agent Connor Brien, who had been sent on a mission to study the Brutes. A recon force of ODSTs are sent in to neutralize the Brutes, and are successful in doing so. The Battle of New Jerusalem takes place sometime this month or the 2552#July|previous. The 26th Marine Expeditionary Force is nearly wiped out, leaving the Rookie as one of the few survivors. The Raid on Mount Haven takes place. The deploys ODSTs in a snatch-and-grab mission to secure the transport of a Forerunner artifact, but after a chain of events involving a group of rogue ODSTs attempting to steal gold from a bank vault, Gage Yevgenny|a wounded ODST manages to halt their operations with a Shiva nuclear warhead.Halo: Evolutions - Essential Tales of the Halo Universe - ''Dirt'' Eventually, the surviving civilians and UNSC forces fall back to Earth, having been informed Reach was just attacked. August 3 Dr. Halsey decides to split Cortana in two halves, with her IEP translation routines analyzing the Forerunner structure under SWORD Base and the other half continuing with John and Blue Team in preparation for Operation: RED FLAG.Halo: Reach, ''Dr. Halsey's personal journal'' August 5 Cortana's split is a success. Early August (sometime from the 6th to the 12th) The crashes in lunar orbit, a slipspace anomaly knocking out communications within the Solar System for seven seconds. August 11 SPARTAN-B312 and Jun-A266 engage in a recon mission on Covenant forces in the colloquially named "Dark Zone", a Covenant-occupied region in the Viery Territory. The two Spartans discover a Covenant invasion force and a landing zone. Kat-B320 receives the visual and tells them to retreat so they will be prepared for the next day.Halo: Reach, campaign level ''Nightfall'' August 12 Battle Group Leviathan and the ''Iroquois'' arrives at Reach for emergency refit and repairs. While the battle group was being repaired, Stanforth and Keyes arrived at Camp Hathcock in the Highland Mountains on Reach for debriefing. Shortly after, they returned to their respective vessels within the battle group.Halo: The Fall of Reach, ''page 252'' (2010) Around this time, Stanforth engages a small group from the Fleet of Valiant Prudence dispatched to retrieve a Site 17 artifact|Forerunner artifact from ONI's Teller Station in the Epsilon Eridani Oort cloud; though he sends reinforcements to successfully cover the station's evacuation, he loses irreplaceable personnel and ships in the process.Halo: Fleet Battles, ''Scenario Four: Run!''Halo: Fleet Battles, ''Scenario Five: Into The Fire'' Halsey reviews the upgrades to the new MJOLNIR Mark V. John-117 and Harland|Corporal Harland are debriefed by ONI at Camp Hathcock, Reach, on the events on Cote d'Azur during the Battle of Sigma Octanus IV. Battle at Szurdok Ridge: UNSC forces assault an amassing Covenant invasion force in the Viery Territory on Reach, managing to destroy two Cheru-pattern Tyrant|AA plasma cannons and a Spire One|Covenant spire. However, the cloaked Sh'wada-pattern supercarrier|supercarrier ''Long Night of Solace'' reveals itself and destroys the frigate , which had been providing air support.Halo: Reach, campaign level ''Tip of the Spear'' August 13 60% of the Epsilon Eridani Fleet is recalled to Reach, destined to arrive within the next 48 hours.Halo: Reach, campaign level ''Long Night of Solace (level)|Long Night of Solace'' August 14 Operation: UPPER CUT and Operation: LEFT JAB are initiated, as Noble Team retakes the Sabre Program Launch/Research Range at Farkas Lake and joins the battle in orbit, eventually capturing the Covenant corvette ''Ardent Prayer'' and using it to deliver the 's Shaw-Fujikawa Translight Engine, used as a makeshift bomb, to the ''Long Night of Solace'' . The ''Solace ''is destroyed at the cost of Jorge-052, who sacrifices himself to detonate the drive manually. Moments after the carrier's destruction, a large Covenant fleet sent by the Ministry of Resolution enters in-system. Following the destruction of the ''Solace'', Kantar 'Utaralee, now acting fleetmaster of the Fleet of Valiant Prudence, leads what little ships he has left in a last-ditch effort to recover Teller Station's Site 17 artifact|artifact, now residing in a UNSC space station orbiting the moon of Turul.Halo: Fleet Battles, ''Scenario Eight: Rally Point Zulu'' August 17 Smart AI Black-Box is created from Graham Alban|a human brain donor to be the personal AI companion for Admiral Margaret Parangosky and activated on Mars. August 18 The Siege of New Alexandria begins as the Covenant lay siege to the city of New Alexandria (location)|New Alexandria. August 23 Noble Six arrives in New Alexandria and helps evacuate civilians from the city. He also manages to severely damage one of the corvettes laying siege to the city by use of an AA missile battery. Noble Six eventually meets up with the rest of Noble Team, and the Covenant begin glassing the city. As Noble Team is on their way to a fallout shelter under the Olympic Tower, Kat-B320 is killed by sniper fire.Halo: Reach, campaign level ''New Alexandria'' August 24 Dr. Halsey examines the rock recovered by Blue Team during Operation: OCEAN BREAKER on Sigma Octanus IV. August 25 Dr. Halsey and Cortana choose the , with Jacob Keyes as its commander, for a secret mission Halsey is planning. August 26 The remainder of Noble Team is evacuated from the destroyed New Alexandria via a Pelican. August 27 All available SPARTAN-IIs gather at the Reach FLEETCOM Military Complex|FLEETCOM Military Complex on Reach, where they learn of their Operation: RED FLAG|next mission: to acquire a Covenant vessel, navigate to the Covenant home world, and return with captured Covenant Hierarchs|leadership. August 29 John-117 receives a SPARTAN neural interface|neural interface upgrade, the second generation of MJOLNIR Powered Assault Armor/Mark V|MJOLNIR Mark V armor, and is introduced to Cortana. Noble Team is ordered to destroy Sword Base in a torch-and-burn op. During the operation, Noble Team makes their way inside Sword Base where they encounter Dr. Halsey, who asks them to protect her lab. Noble Team is then given direct orders to escort a fragment of Cortana holding crucial data from the Babd Catha Forerunner complex to the ''Pillar of Autumn''. Halsey is then escorted back to CASTLE base by Jun-A266. August 30 File:Fall of Reach 1.jpg|300px|thumb|Fall of Reach|Reach falls to the Covenant. Cortana has ONI Colonel James Ackerson illicitly transferred to the front. This is her revenge for his attempts to eliminate both her and John-117. First Lieutenant Jake Chapman, along with most of Charlie Company is killed during the Fall of Reach. The Covenant, despite sustaining heavy losses, wins a crushing victory at the Fall of Reach. Many of the remaining SPARTAN-IIs are killed. The surviving SPARTAN-IIs on Reach are separated into two groups. One recovers Danforth Whitcomb|Vice Admiral Whitcomb and goes into hiding at Camp Independence. The others are admitted into CASTLE Base by Dr. Halsey and receive parts of the MJOLNIR Mark V upgrade and new weapons. Dr. Halsey learns of Colonel Ackerson's SPARTAN-III Program|mysterious plans that seem to involve "her" Spartans. The three surviving members of Noble Team arrive at Aszod; Carter-A259's Pelican becomes too badly damaged to continue carrying them all, so Noble Six and Emile-A239 deploy to the ground. Battle of Aszod: The Covenant forces throughout Aszod attempt to stop Noble Six and Emile from reaching the ''UNSC Pillar of Autumn|Pillar of Autumn'', going so far as to deploy Deutoros-pattern Scarab|Scarabs against them. Carter sacrifices himself when he steers his damaged Pelican into a Scarab, destroying it. Emile and Six proceed to push towards the Aszod ship breaking yards|ship breaking yards and rendezvous with the scant UNSC forces still attempting to defend the facility. After clearing most of the facility, Six, Emile, and several Trooper squads meet up with Captain Jacob Keyes, successfully delivering the fragment of Cortana. However, Emile is killed by a Sangheili Zealot. SPARTAN-B312 destroys a ''Ket''-pattern battlecruiser with a 15cm Mark/2488 1.1GJ MAC|mass driver to allow the ''Pillar of Autumn'' to escape Reach. The Spartan is killed by Sangheili soon after. The ''Autumn'' jumps away from the system, with Cortana using Forerunner navigation data from the Sigma Octanus IV artifact as well as the Babd Catha Forerunner complex. Unknown date The planet Coral is reported glassed by the Covenant. September 4 Lieutenant Wagner returns to Earth and reports on the evident destruction of Reach to the UNSC Security Council (Colonel James Ackerson, Fleet Admiral Terrence Hood, and Major General Nicolas Strauss) at HIGHCOM Facility Bravo-6 in Sydney, Australia. Hood determines that the location of Earth is compromised and decides that all ONI theatres of operation must be relocated. The Security Council also begins planning for the final defense of Earth. ONI launches an investigation of a SecNet conversation between Sergeants Joseph M. Poteet (Username: TRIGTECH) and Alasdair R. Schicker (Username: GLancer) to discover whether they might have accidentally leaked the location of Reach to the Covenant.Halo: The Fall of Reach (2010) - ''Adjunct'' September 5 UNSC fleet actions in the Reach Defense Coordination Zone conclude. All remaining UNSC Navy|naval forces are consolidated into a single command grouping: the UNSC Home Fleet. Fleet Admiral Joseph Harper of the Fifth Fleet is appointed senior flag officer of the Home Fleet and given primary administrative and tasking authority over all assets in the Sol system under emergency directives authorized by UNSC High Command and approved by the UEG Security Council. September 14 A new set of Orbital Defense Platforms over Earth are scheduled to come online.Halo: First Strike, ''page 104'' September 18 Around 2200 hours ship time: Captain Keyes and other key crew wake up on the , and check the status of the ship.Halo: The Fall of Reach Epilogue, ''page 377(Definitive Edition)'' September 19 Captain Keyes and crew make it to the bridge of the ''Pillar of Autumn'' and ask Cortana to shut down all systems before returning to normal space. The ''Pillar of Autumn'' then leaves slipspace, and glides around Basis into Threshold's orbit, at which point Cortana detects a radio echo in the shadow of Threshold. 0103 hours ship time: The ''Pillar of Autumn'' cryo team prepare to wake John-117 under orders from Captain Keyes. Meanwhile, the Covenant Fleet of Particular Justice prepare to attack the ''Pillar of Autumn''.Halo: The Flood, ''Prologue'' The Battle of Installation 04 begins. 0120 hours ship time: Keyes learns of the Covenant presence in the system and decides to wake the whole crew out of cryo.Halo: Combat Evolved, campaign level ''The Pillar of Autumn (Halo: Combat Evolved level)|The Pillar of Autumn opening cutscene'' 0127 hours ship time: The Fleet of Particular Justice finally strike the ''Pillar of Autumn''. John-117 is also woken from cryo sleep around this time and tasked with preventing Cortana's capture by the Covenant. John-117 and Cortana escape the ''Pillar of Autumn'' aboard a Class-3 Enclosed Heavy Lifeboat, Controlled|Bumblebee escape pod, which later crashes on the ring.Halo: The Flood, ''Chapter 1'' The Pillar of Autumn is forced to crash land on the ring. A significant portion of its crew survives to continue the fight on the ground. Captain Keyes and the others in his escape pod are captured by the Covenant. Only Keyes escapes summary execution, and is taken to the ''Truth and Reconciliation'' for interrogation. A large group of ODSTs and survivors, under the command of Major Antonio Silva, (who assumed command of ''Autumn'' 's surviving crew after Captain Keyes' capture by the Covenant) establish Alpha Base (Installation 04)|Alpha Base, which serves as the main tactical firebase for the survivors and as a staging point for any future Covenant attacks. File:SC new.png|200px|thumb|John-117 leading Marines on Installation 04. John-117 leads a UNSC Marine Corps|Marine force to board the ''Truth and Reconciliation''. They recover Keyes and escape aboard a Dextro Xur-pattern Spirit|Covenant dropship. September 20 Keyes orders John-117 to find the "Silent Cartographer", a map room that will reveal the location of the Control Room. Keyes leaves to lead an assault on a Covenant weapons cache. Having found the map room and the pertinent information, Cortana directs a Echo 419|Pelican to take them to the area where the ring's Control Room is. Upon reaching the Control Room, Cortana transfers to the Control Room's computer and directs John-117 to stop Keyes from accessing the 'weapons cache', in reality a Forerunner Flood containment facility. Before transporting the Chief to the supposed weapons cache, Carol Rawley records a mission report detailing their underground insertion near the Control Room. This report is entered into the UNSC Archives.Halo Infinite: Memory Agent, ''Chapter 3: We Deliver'' John-117, without Cortana, enters the supposed weapons cache but is unable to locate Keyes. Instead, he discovers the Flood and is forced to retreat. He links up with marines and takes command of the surviving members of Keyes' team and together they fight their way to the extraction point. However, the Spartan is conscripted by 343 Guilty Spark and Slipspace translocation|teleported away before he can be evacuated with the surviving members. Major Silva and the others under his command abandon Alpha Base after discovering a large Flood infestation beneath the base. They then learn that the ''Truth and Reconciliation'' has been abandoned and lead a strike force to capture the ship. The Flood succeed in capturing the Covenant dropship ''Brilliant Gift'', and use it to crash-land on board the Covenant ship ''Infinite Succor'', in orbit above Installation 04, with the intent to spread itself to the rest of the Fleet of Particular Justice. This is avoided when Special Operations Commander Rtas 'Vadumee sets the ''Infinite Succor'' on a crash-course vector for the system's star, Soell. Rtas 'Vadumee is the only survivor. The SPARTAN-IV program enters development under the oversight of Admiral Margaret Parangosky, CINCONI. The project's existence is kept secret from both Dr. Catherine Halsey and Colonel James Ackerson, the respective creators of the SPARTAN-II and SPARTAN-III programs. September 21 The Monitor takes John-117 to the ring's Library to retrieve the Activation Index, a device needed to activate the ring's primary weapon. Having retrieved the Index, the Monitor teleports the Spartan back to the Control Room where an irate Cortana confiscates the Index and prevents the ring from firing. John-117 and Cortana flee a now-hostile 343 Guilty Spark and Sentinels. To forestall the ring from being activated manually, John-117 disables the ring's three phase pulse generators. This is to buy time to destroy the ring by activating the auto-destruct on the ''Pillar of Autumn''. Only Keyes' command neural interface can activate the ship's self-destruct, and John-117 embarks once more to rescue the captain. The failed attempt to activate Alpha Halo results in the first Onyx Sentinels appearing. September 22 Cortana teleports John-117 to the now Flood-overrun ''Truth and Reconciliation'' where Jacob Keyes is being held. Alas, the pair arrives too late to save Keyes, who has been merged into a proto-Gravemind. John-117 retrieves the neural interface by punching in the former-captain's head. Cortana downloads the necessary codes, and the duo returns to the ''Pillar of Autumn'' on a captured Banshee. Major Silva's forces arrive at the ''Truth and Reconciliation'' and take over the ship through a combined surprise assault on the vessel's hangar bay and gravity lift. They also manage to capture the cruiser's prophet, the Prophet of Stewardship. After capturing the cruiser, Major Silva intends to fly the ship back to Earth in order to be recognized as the hero of the Battle of Installation 04; this acts a both a huge violation of the Cole Protocol and risks spreading the Flood. First Lieutenant Melissa McKay realizes this, so, in a snap-decision, she severs the primary optical fiber cable that linked controls from the bridge to engineering with a fragmentation grenade, thereby causing the cruiser to lose control and crash onto the surface of Halo. 343 Guilty Spark overrides the auto-destruct sequence, forcing John-117 to manually destabilize the ship's still-functioning fusion cores. John-117 and Cortana then escape the resulting explosion and the fragmentation of the ring aboard a Longsword. Avery J. Johnson|Staff Sergeant Johnson, Lieutenant Haverson, Warrant Officer Polaski, and Corporal Locklear also escape the destruction of the ring aboard a Pelican. In the course of the ring's destruction, Alpha Shard|a fragment of Installation 04 enters slipspace. This fragment later re-enters normal space in the vicinity of a red giant star. The Battle of Installation 04 ends. John-117 and Cortana rendezvous with Johnson's group in Installation 04's debris field. They also recover a set of cryo chambers, one which contains Linda-058. Skirmish over Threshold: As the Longsword and Pelican are not jump capable, the UNSC survivors assault and capture the Covenant flagship ''Ascendant Justice''. They then set course for Reach. Jersey Morelli confronts his mother about having an affair. September 23 The month's temporal anomaly is seemingly rectified by this date. After the destruction of Installation 04, Installation 00 commences the Installation 08|construction of the replacement for Installation 04. September 26 ONI agent Jameson Locke compiles a target profile report concerning Supreme Commander Thel 'Vadamee, detailing 'Vadamee's personal history from the start of the Human-Covenant War to the glassing of Reach.Halo 2: Anniversary, ''Terminal (Halo 2: Anniversary)|Terminals'' September's anomaly After the recovery of a Forerunner device on Reach, the members of an organized resistance comprised of Spartans from Reach and survivors of the Battle of Installation 04 are in some sort of time anomaly, causing them not to be in the "correct timeline".Halo: First Strike What is known is that the events take place with the possession of the device after September 7. File:Fight on Ascendant Justice.png|thumb|250px|John-117 and Marine survivors fighting on the ''Ascendant Justice''. September 7 The time/date record anomaly of Sept 23, 2552 most likely rejoins the correct timeline. Dr. Halsey and members of Red Team discover an Forerunner crystal|enigmatic shard in a Menachite Forerunner Complex|Forerunner installation below CASTLE Base. They are besieged by Covenant forces who seek to possess the shard. Dr. Halsey initiates Operation: WHITE GLOVE, destroying CASTLE Base, thus preventing the Covenant forces above from capturing any UNSC or Forerunner technology. Halsey and members of Red Team are protected from the resulting detonation when they hide in the caves beneath the base. The remaining Spartans, Danforth Whitcomb|Admiral Whitcomb, Dr. Halsey, Avery Junior Johnson|Sgt. Johnson, Elias Haverson|Lieutenant Haverson, Warrant Officer Polaski, and Corporal Locklear jump to Slipspace on board the Covenant/UNSC hybrid ship -''Ascendant Justice'', and discover that the shard seems to have the ability to bend both space and time. September 12 The ''Gettysburg''/''Ascendant Justice'' arrives for refit and provisioning in the Eridanus system. Vice Admiral Whitcomb secures a meeting with rebel leader Governor Jacob Jiles, attempting to reason with him that the Covenant would most likely arrive to claim the Forerunner crystal. When several Covenant warships emerge from slipspace, Jiles agrees to help the UNSC forces. Dr. Halsey sedates Kelly-087, and absconds with her on Governor Jiles' personal ship, the Chiroptera-class subprowler|''Chiroptera''-class ''Beatrice''. Before she goes, she gives the Forerunner crystal to Corporal Locklear, with implicit instructions to destroy it. A large Covenant fleet enters the Eridanus system, forcing the hand of Admiral Whitcomb; he pulls out and retreats, as does the ''Gettysburg''/''Ascendant Justice'', leaving the rebels to their doom. Governor Jiles is killed and the Eridanus rebels are destroyed during the Massacre at Eridanus Secundus. Eridanus Secundus itself is destroyed by the Covenant. September 13 UNSC forces aboard the ''Gettysburg/Ascendant Justice'' win a crucial victory at the Operation: FIRST STRIKE|Battle of the ''Unyielding Hierophant''. SPARTAN-093, Lieutenant Haverson of ONI and Vice Admiral Whitcomb are killed. The survivors, now aboard the singular and with a captured Covenant slipspace drive, depart for Earth to warn of the impending Covenant invasion. Unknown date An edict from the Office of the High Prophet of Truth orders that in the virtue of the Jiralhanae, all Sangheili posted with the Fleet of Profound Solitude, the Fleet of Tranquil Composure, and the Fleet of Inner Knowledge to be completely replaced by Jiralhanae. Each removed Sangheili to be assigned other duties. In celebration, all imprisoned or criminal Jiralhanae were released, rehabilitated, and pardoned.Halo Wars: ''Halo Timeline'' ODST Sarah Palmer, the future commander of the SPARTAN-IV program|SPARTAN-IVs on , rescues Admiral Kovalic and a vital AI from a planet under Covenant attack. Wounded in action, Palmer is sent to Lockhart medical station|''Lockhart'' medical facility to recover.Halo: Initiation, ''Issue 1'' October 8 After escaping from the Battle of Tribute, the freighter ''Floral Express'' discovers Installation 03.''Eleventh Hour reports'' Admiral J. Garcia forwards Log 010089 to UNSC High Command, which contains the preliminary reports of action during the Fall of Reach|Defense of Reach.Halo Legendary Crate, ''Halo Legendary Crate/Data Drops|Data Drop #2'' October 9 Doctor O. Cheng forwards Log 010921, an intelligence report incorporating recent naval losses during the Fall of Reach, to the UNSC Security Council. October 10 The UNSC Navy's Third Fleet, and specifically Battle Group Rhino loses the in the Battle of October 10. October 17 Captain W. Murray reports an after-action report of the Battle of October 10 in the form of 83 files later termed Log 010991. October 19 Aboard ''Cairo Station'', Sergeant Johnson is interrogated by Dr. Veronica Clayton of ONI in regards to the events surrounding Operation: First Strike.Halo Legendary Crate, ''Halo Legendary Crate/Data Drops|Data Drop #10'' Cortana details the Battle of Installation 04 to ONI. During a routine seismic scan, Vergil, a subroutine of New Mombasa's Superintendent AI, discovers a Portal at Voi|seismic anomaly underneath the city. The report is accessed by Endesha|Dr. Daniel Endesha, a scientist responsible for the management of the AI.''Sadie's Story'' October 20 File:H3ODST MombasaBattle Concept.jpg|200px|thumb|The Battle of Earth at Mombasa. John-117 is outfitted with the MJOLNIR Powered Assault Armor/Mark VI|MJOLNIR Mk. VI aboard ''Cairo Station (station)|Cairo Station''. 1248 hours: Io Station detects a possible Covenant sighting in the Sol system and contacts the UNSC Home Fleet. Cortana, on board the ''Cairo'', receives the message and briefs Lord Hood.Halo 2, level ''Cairo Station'' On High Charity, Thel 'Vadamee, the disgraced Supreme Commander of the Fleet of Particular Justice, is deemed a heretic by the Covenant High Council and is sentenced to death for his failure to safeguard Installation 04 one month prior. John-117 and Staff Sergeant (now promoted to Sergeant Major) Johnson are awarded the Colonial Cross at a ceremony aboard Cairo Station. Captain Keyes is awarded posthumously and the decoration is entrusted to his daughter, Miranda Keyes. Instead of being executed, 'Vadamee is given the title of Arbiter by the High Prophets of Truth and Mercy, and sent to Threshold with Rtas 'Vadumee and Tartarus on Raid on the Threshold gas mine|a mission to eliminate a band of Sesa 'Refumee's heretic faction|heretics led by Sesa 'Refumee. Following 'Refumee's death, the group recovers 343 Guilty Spark. The High Prophet of Regret's Fleet of Sacred Consecration|fleet eventually arrives at Earth, not expecting any human presence. The vastly outnumbered Covenant force attacks the UNSC Home Fleet without seeking support from other Covenant forces, precipitating the Battle for Earth. 1412 hours: Lord Hood and Fleet Admiral Joseph Harper|Harper coordinate Earth's orbital defense during the opening stages. 1421 hours: ''Malta Station'' and ''Athens Station'' are destroyed, clearing the way for the first attack wave. 1450 hours: John-117 foils a Covenant attempt to destroy the ''Cairo'' and instead uses the bomb to sabotage the ''Day of Jubilation'', one of Regret's only two assault carriers. 1459 hours: Having successfully made it planetside, Regret's remaining carrier and flagship, ''Solemn Penance'', initiates a Battle of Mombasa|ground assault on New Mombasa. John-117 is recovered by the and deploys to Mombasa in an attempt to capture the Prophet. The civilian populace begins to evacuate; Dr. Endesha's daughter Sadie Endesha|Sadie and former NMPD cop Mike Branley Sadie's Story|navigate the war-torn streets of New Mombasa with the help of Vergil in order to reach her father in the New Mombasa Data Center. However, the corrupt police commissioner, Kinsler, in an act of vengeance against Sadie for refusing his previous sexual advances, has his men kill her father with argon gas by tripping the data center's fire suppression system. During the fighting, the Covenant damage the Superintendent's data systems; a Quick to Adjust|lone Huragok survives and starts to repair the AI, saving Vergil by starting to absorb it into its own system. Kinsler, intending to take Sadie a prisoner as he leaves the city, is killed by Vergil after the subroutine allows a mob to tear him apart. Despite Sadie's pleas to stay and find him, Vergil sends her off on a NMTA|train with Mike towards Nairobi, saving her life. 1512 hours: Designated a Tier One Asset, the UNSC identifies the Huragok as being at risk of being killed or captured by the Covenant. 1557 hours: Elsewhere in the city, ODST squad Alpha-Five participates in Operation: WINDOW PANE|an unsuccessful mission to retrieve a Forerunner device called the Conduit from Covenant hands. 1602 hours: As part of Operation: BUMRUSH|a mission to take down the ''Solemn Penance'' from orbit, Alpha-Nine|a squad of ODSTs led by ONI Captain Veronica Dare and Edward Buck|Gunnery Sergeant Edward Buck, consisting of Corporal Taylor "Dutch" Miles, Lance Corporal Kojo "Romeo" Agu, Michael Crespo|PFC Michael "Mickey" Crespo, and the Rookie, drop into New Mombasa from the . 1603 hours: With Regret afraid of being overrun, the ''Solemn Penance'' initiates an in-atmosphere Slipspace jump to escape the city; while the ''In Amber Clad'' manages to pursue the carrier through the rift, the resulting explosion severely damages New Mombasa's infrastructure as well as scatters Alpha-Nine's SOEIV|drop pods across the city. Having tailed Regret to Earth, a Jiralhanae-led Covenant Truth's fleet|occupation force is inserted into New Mombasa immediately after Regret's retreat as a part of the Prophet of Truth's plan to eventually Changing of the Guard|replace the Sangheili with the Jiralhanae as the Covenant's primary warrior race. For the rest of the day, UNSC and Covenant forces battle for control of the city. 1606 hours: Gunnery Sergeant Buck lands at Tayari Plaza (location)|Tayari Plaza and assists Marine forces in combating the Covenant. Though he fails to link up with Captain Dare, he regroups with Lance Corporal Agu. 1636 hours: Corporal Miles assists an unidentified colonel in securing Regret's old landing zone within the Uplift Nature Reserve. 1649 hours: Due to structural damage caused by the Slipspace explosion, the Mombasa Tether implodes and collapses, killing the colonel and scattering Marine forces into disarray. Miles manages to escape the reserve shortly after. By this point, the Covenant occupies 38% of the city. 1736 hours: PFC Crespo leads a Scorpion charge to assist Marines in clearing out Kizingo Boulevard (location)|Kizingo Boulevard and reaching their ONI Alpha Site (location)|rally point, where he reunites with Miles. 1806 hours: Crespo and Miles aid the New Mombasa Police Department in preventing the Covenant from accessing important data housed in ONI's Alpha Site. 1852 hours: The troopers are forced to fall back and extract via D77C-NMPD Pelican|police Pelican while Buck contacts Miles and Crespo to request a pick-up at the NMPD HQ|police headquarters. Crespo then detonates the Alpha Site to deny it to the Covenant. The resulting explosion inadvertently awakens a large Yanme'e|Drone hive in the tunnels below the base. By this point, the Covenant occupies 51% of the city. 1936 hours: En route to the police HQ, Miles and Crespo's Pelican is shot down; Buck and Agu rescue them after a holding action that wounds Agu in the process. 2106 hours: Buck and his squad regroup; realizing the trains out of the city are flooded, they capture a Phantom at Kikowani Station (location)|Kikowani Station in an effort to escape. 2141 hours: Remaining Covenant cruisers coalesce over New Mombasa. 2206 hours: The Rookie wakes up from the drop and starts to search the streets of New Mombasa for his squadmates. 2215 hours: Cruisers begin excavation of the crater left behind by the Slipspace explosion, which Buck witnesses from Kikowani. 2227 hours: By this point, the Covenant occupies 78% of the city. Having fled the area, Buck forces his squad to turn around after realizes where Dare went. 2319 hours: Dare, having holed up in the city's data center, sights and reports the Tier One Asset Huragok in the tunnels. 2324 hours: By this point, the Covenant occupies 94% of the city. The Rookie receives Dare's distress call and fights his way through the data center to link up with her; together, they capture the Huragok, which by this point has fully absorbed the Superintendent (and Vergil) into itself. 2359 hours: Buck arrives to help secure the Huragok, now identified as Vergil. The Battle of Mombasa ends with a Covenant victory. October 21 Buck, Dare, and the Rookie defend the Huragok as they fight their way to the surface. At dawn, the team witnesses continual Covenant reinforcements arriving at Earth to aid in excavation efforts. They flee down the city's New Mombasa Waterfront Highway|Waterfront Highway and reconnect with the rest of Alpha-Nine at the entrance to the Uplift Nature Reserve. The squad manages to hold out and eventually escapes New Mombasa as the city, along with its surroundings, are Glassing|glassed by the excavation fleet. October 21 through November 17 Following the Battle of Mombasa, Alpha-Nine and Quick to Adjust are kept in an ONI orbital facility.Halo: New Blood, Chapter 9 October 20 through November 2 The Spartan-II Blue Team is deployed to defend Earth during the two weeks that follow the initial Covenant invasion. They participate in numerous combat missions on and around Earth, including Battle of Ross Island in the Wikipedia:Antarctica|Antarctica and an underwater operation in the Yucatan Peninsula. Late October The majority of the SPARTAN-IIIs of SPARTAN-III Gamma Company|Gamma Company are deployed into the battlefields of the Human-Covenant War, with only the top-ranked fireteams Team Saber|Saber, Team Katana|Katana, and Team Gladius|Gladius remaining on Onyx to compete for top honors.Halo: Ghosts of Onyx, ''page 139'' October 25 The Office of Naval Intelligence sends an exploration-and-neutralization team to Installation 03|Gamma Halo. Skirmish on Mona Lisa|Skirmish on ''Mona Lisa'': The is sent to Installation 04's debris field in the Soell system to scout the area for survivors. They detect the prison ship ''Mona Lisa'' and deploy Marines into the ship. Soon after, it is revealed that the ship is infested by the Flood and was used by the Office of Naval Intelligence as a laboratory to test the parasite on prisoners. The infestation is contained as the ''Red Horse'' unleashes a Shiva-class nuclear missile on the ''Mona Lisa'', destroying it.Halo: Evolutions - Essential Tales of the Halo Universe - "The Mona Lisa" October 31 The Onyx Conflict begins. The standby signal rouses the Onyx Sentinel|Sentinels of Onyx, who destroy the UNSC base on the world. Team Gladius of the SPARTAN-III Gamma Company is totally wiped out by the Sentinels. Team Katana is forced into Zone 67, and Team Saber loses contact with Camp Currahee. Kurt-051, Franklin Mendez|SCPO Franklin Mendez and Petty Officers Tom-B292 and Lucy-B091 begin to form a resistance against the Sentinels. The , in high orbit above Onyx, is destroyed by Sentinels. Chief Mendez declares emergency code Bloody Arrow over the UNSC E-BAND. The end of 2552 saw the bloodiest period of the Great War and the beginning of the end. The Prophet of Truth was killed in the later months along with a sizable Covenant armada, leaving the Covenant forces crippled and leaderless as well as the full destruction of the Gravemind and its Flood forces. November 2 The Battle of Installation 05 begins. The UNSC ''In Amber Clad'' arrives at Delta Halo, following the High Prophet of Regret's assault carrier. John-117, aided by ODSTs and marines, pursue the High Prophet to a Forerunner temple and assassinate him. However, orbital bombardment from the escorting fleets of the newly arrived High Charity destroys the temple. John-117 is thrown into a lake and captured by the Gravemind. The Changing of the Guard within the Covenant occurs. November 3 File:H2A Great Schism.png|thumb|250px|Jiralhanae and Sangheili ships fighting over High Charity. The Great Schism begins. The Prophet of Conviction is killed by Unidentified Shipmaster (Righteous Vigilance)|one of his shipmasters after learning that Conviction ordered the killings of the Sangheili councilors within the Fleet of Righteous Vigilance. The Arbiter is sent to Delta Halo to retrieve that installation's Activation Index|Index. The Arbiter is successful, but is then betrayed by Tartarus, who casts the Arbiter into the depths of the ringworld. The Arbiter is subsequently captured by Gravemind. Gravemind sends John-117 and the Arbiter to secure the Index and prevent the installation from being activated. John-117 is teleported to High Charity while the Arbiter is teleported close to the Control Room. Both are aided by the chaos of the Covenant civil war. The Flood controlled ''In Amber Clad'' jumps inside High Charity and commences its infection. The Prophet of Mercy becomes infected by the Flood. John-117 is unable to prevent the Index from leaving High Charity with Tartarus. Instead, on the advice of Cortana, the Spartan stows away aboard the Forerunner Dreadnought that is carrying the High Prophet of Truth to Earth. Cortana remains behind to ensure the destruction of Installation 05, should that become necessary. Cortana sends a slipspace message to Earth informing them that John-117 is en route. The Arbiter reaches Installation 05's Control Room but is unable to prevent Tartarus from activating the ring. With the help of humans and the Sangheili, the Arbiter kills Tartarus. This allows Commander Keyes to physically remove the Index from the Core, temporarily interrupting the firing sequence. Due to the interruption, Installation 05 automatically sends a signal to all other Forerunner installations in the galaxy, activating and placing them in standby mode. The arrives at Delta Halo and witnesses the final stages of the Battle of Installation 05. She retreats to Earth via an anomalous Slipstream space#Slipspace wake|slipspace wake caused by the Forerunner ship. Dr. Halsey and Kelly-087 arrive at Onyx and are trapped along with the rest of the human survivors. Halsey sends a distress signal piggybacked on Cortana's October 28 signal. The Battle of Havana is fought. William-043, Linda-058, and Frederic-104 manage to stall the Covenant's forces in Havana, Wikipedia:Cuba|Cuba by destroying the Centennial Orbital Elevator. They receive new orders from Dr. Halsey to redeploy from Earth to Onyx, capture the Covenant destroyer ''Bloodied Spirit'', and depart for Onyx. Voro 'Mantakree is promoted to Fleet Master by Imperial Admiral Xytan 'Jar Wattinree, and is given the mission to intercept the Spartans heading for Onyx and to retrieve the Forerunner technologies said to be there. Danforth Whitcomb's NOVA bomb detonates on board the Covenant supercarrier ''Sublime Transcendence'', in orbit above the Sangheili outpost world Joyous Exultation, destroying every ship in the vicinity, and also scorching a quarter of Joyous Exultation and completely vaporizing the nearby moon Malhiem. The ''Dusk'' arrives at Earth after mere hours. Upon arrival, she is reassigned to Battle Group Omicron. The group jump to Onyx via the ''Bloodied Spirit slipspace wake. Blue Team arrives at Onyx aboard the captured ''Bloodied Spirit'', and links up with Kurt-051, Kelly-087, Dr. Halsey, Chief Mendez, and the SPARTAN-III's. They proceed to push forward into Zone 67, retreating further underground when a newly arrived Joyous Exultation Covenant|Covenant fleet begins landing troops. Admiral Carl Patterson|Patterson's Patterson's battle group|battle group arrives at Onyx to retrieve the survivors, but is unsuccessful due to the Covenant presence. The UNSC battlegroup is destroyed, with the exception of the ''Dusk'', which avoids destruction by remaining stealthed. After an emergency mission redirect by the ONI AI Endless Summer, Kurt-051 and his forces proceed to destroy the Sentinel manufacturing facility|Sentinel factory in Onyx's polar region and retrieve Team Katana, enclosed within slipspace field pods. Onyx is found to be an artificial structure built by the Forerunners to house a shield world. The human survivors hold off pursuing Covenant troops long enough to flee to the safety of the shield world. Kurt promotes Frederic-104 to Lieutenant, Junior Grade. Kurt-051 dies after detonating 2 FENRIS warheads inside Onyx's core room antechamber. The Onyx Conflict ends. Sentinels annihilate the remaining Covenant forces as Onyx's artificial landmass disintegrates. Chol Von, a T'vaoan Shipmaster|shipmistress, renamed her missionary ship ''Paragon|Joyous Discovery'' as ''Paragon'' at some point of the Great Schism.Halo: Mortal Dictata, ''page 141'' During the Schism, she captured a Phantom, killing two Sangheili in the process.Halo: Mortal Dictata, ''page 73'' November 4 In an effort to contain the Flood outbreak, Fleet of Retribution|Thel 'Vadam's Covenant faction begins glassing Installation 05's surface and proceed to destroy any ships leaving the ring.Eleventh Hour reports, ''Heirlooms'' Cortana is deposited into ''High Charity''s distributed network.Halo Legendary Crate, ''Halo Legendary Crate/Data Drops|Data Drop #9'' November 7 A Catalog unit, having been dormant for 100,000 years after the firing of the Halo Array, resumes its duties after receiving and denying a control authorization supposedly sent by the Librarian. November 8 The Prophet of Truth arrives in the Sol system aboard the Forerunner Dreadnought, and proceeds on course towards Earth at near-relativistic speeds. However, due to John-117's presence aboard the vessel the ship's crew becomes preoccupied with finding and eliminating the Spartan. November 8 through November 15 Sergeant Major Johnson and Miranda Keyes|Commander Keyes arrive back at Earth from Installation 05. November 8 through November 17 The Battle of Mare Erythraeum takes place on Mars. Following the battle, Colonel James Ackerson, commander of the UNSC forces on Mare Erythraeum, is taken hostage and interrogated by the Jiralhanae Commander Lepidus on board the Covenant cruiser ''Triumphant Declaration'', who tells them of a Forerunner device linked to the Halo Array known as the Key of Osanalan, and that it can be found in Cleveland, Ohio. In reality, the Key of Osanalan is made up as a ploy by James Ackerson to prevent Cleveland from being glassed as part of the battle on Earth in a bid to save the life of his brother, Ruwan Ackerson|Ruwan, who lives there. Battle of Cleveland: Covenant forces, looking for the Key of Osanalan, invade the city of Cleveland. After Ruwan learns the reason the Covenant are invading, he devises a plan with Twyker|Sergeant Twyker. November 10 The URNA Southwest Campaign begins as Covenant forces start to excavate and occupy built-up positions centered around Free-fire Area OZONE in Arizona, URNA. November 15 1649 hours: Sergeant Major Johnson gets clearance from Lord Hood to question Vergil about Portal at Voi|the artifact the High Prophet of Truth is digging up near Voi. Captain Dare participates in the interrogation. 1725 hours: AI Barca generates the interrogation into a ONI Directorate Memorandum Interrogation Findings|report for Lord Hood. November 17 File:S117returnstoEarth2552.jpg|thumb|250px|John-117 and the Forerunner Dreadnought entering Earth's atmosphere. Believing the Spartan to be dead, the Prophet of Truth orders the crew of the Forerunner Dreadnought to jump further in-system and enter Earth's atmosphere. The Dreadnought arrives at Earth, and John-117 makes contact with Lord Hood aboard the ''Cairo''.Halo 2, level ''The Great Journey (level)|The Great Journey'' Shortly after, the Spartan is ordered to find a way off the ship to avoid being caught in the impending destruction of a nearby Covenant cruiser, ''Harbinger of Piety''.Halo Uprising, ''Halo: Uprising Issue 4|Issue 4'' Injected with an Tykos 30|organic tracking material, Ruwan, claiming to the Covenant that he himself is the Key, is taken aboard the cruiser ''Harbinger of Piety'', where the Minister of Inquisition vows to spare Earth in exchange for Ruwan's knowledge. Nassau Station then uses its Magnetic Accelerator Cannon to obliterate the ''Piety'' and everyone on board. John-117 proceeds to eject from the ship, using a hatch as a heat shield upon re-entry. Meanwhile, Battle of Sector Six takes place at Sector Six. There, numerous Marines of the 2nd Orbital Drop Shock Trooper Battalion|2nd ODST Battalion track John-117's descent. John-117 eventually lands in the Tanzanian jungle near Mount Kilimanjaro, going unconscious for hours. The Prophet of Truth's Dreadnought lands in the middle of the Portal near Voi, Kenya. During the last few weeks, Truth's fleet have almost entirely uncovered the Portal and occupied the entire region surrounding it. After the Key of Osanalan is revealed to be a ruse, Lepidus executes Ackerson aboard ''Triumphant Declaration''. UNSC forces Recovery of John-117|recover John-117 from a jungle near Mount Kilimanjaro. In the underground facility of Crow's Nest (location)|Crow's Nest, a plan is formulated to launch an aerial strike on Covenant anti-air defenses in the town of Voi in order to prevent the Prophet of Truth from activating the Forerunner artifact. After repelling a Attack on Crow's Nest|Covenant assault on Crow's Nest and destroying the base in the process, a UNSC strike force led by John-117 Assault on the Tsavo Highway|retakes the Covenant-held Tsavo highway (location)|Tsavo Highway. Battle of Voi: John-117 and a Marine strike force enter Voi and gradually push back the city's Covenant occupiers, destroying the Covenant anti-air defenses in the city. An Battle Group Victory|aerial strike force consisting of the and at least six other frigatesHalo Mythos, ''page 117'' as well as numerous Longsword fighters assaults the Forerunner Dreadnought resting over the Portal artifact, but are unsuccessful in damaging the ship. Truth activates the portal and retreats through it to Installation 00 along with his forces. At the same moment, a Indulgence of Conviction|Flood-controlled ship slips in, crashing in Voi. Covenant battlenet cohesion breaks down after Truth's departure, allowing UNSC forces in the southwest URNA to begin a major counteroffensive as part of their ongoing campaign. File:H3 TheArk Opening.jpg|250px|thumb|The Ark portal on Earth activates. UNSC forces make their way toward the crashed ship in order to overload its reactors and contain the Flood outbreak, just as the Sangheili Fleet of Retribution arrives and drops in reinforcements. After recovering a message by Cortana from the Flood ship, John-117 and the remaining human and Sangheili forces retreat from Voi, as the Fleet of Retribution glasses the city and its surroundings in order to contain the Flood. UNSC and Sangheili leaders gather aboard the Sangheili assault carrier ''Shadow of Intent'' to hear Cortana's message, which reveals there is a way to stop the Flood on the other side of the Portal. Despite Lord Hood's argument to stay and defend Earth from an encroaching now-Flood-infested High Charity, Commander Keyes, along with the Master Chief and the Sangheili, enter the Portal with the Fleet of Retribution and the ''Dawn'', leaving Hood behind to coordinate Earth's remaining defenses. November 18 1545 hours: High Charity arrives at Mars and makes a slipspace jump to the lesser Ark. The is spotted by Jiralhanae hunting parties and boarded. However, after capturing the flight deck, the Jiralhanae and Unggoy attackers have difficulty pushing into the vessel's cramped interior. The resulting stalemate convinces the Jiralhanae to withdraw, settling on destroying the supercarrier's flight tower as they depart. November 19 0630 hours: At Free-fire Area OZONE in Arizona, UNSC flagword LUX is declared and a UEG emergency evacuation broadcast is initiated. 0700 hours: The UNSC uses nuclear weapons against multiple shielded Covenant positions. File:H3 LesserArkConflict.png|250px|thumb|A battle rages above Installation 00. December 3 Admiral Joseph Harper initiates Operation: MARSH FLASH in Arizona, eliminating clusters of high-ranking Jiralhanae leadership attempting to activate an artifact at Free-fire Area OZONE, effectively bringing a close to the URNA Southwest Campaign. December 11 The Battle of Installation 00: The joint Sangheili-human force arrives at Installation 00 and immediately engages Truth's forces while the deploys ground forces to locate Truth. Despite being outnumbered three to one in space, the separatist fleet makes short work of the Covenant space forces. After locating Truth via the Cartographer, the separatist-UNSC alliance launches an assault on the Ark's Forerunner Citadel|Citadel where Truth intends to activate the Halo Array. At the same time the former Covenant city ship High Charity arrives from slipspace and crashes on the Ark. Debris spread from the city-ship helps spread a new Flood infestation on the Ark. The Sangheili and UNSC finish off the last stand of the Covenant's resistance, consisting of two Scarabs and many other ground forces, in Battle of the Citadel|a large battle before the Citadel. File:TruthDeath-large.jpg|250px|thumb|The death of Truth and the Covenant's end. Miranda Keyes is killed when she attempts to rescue Johnson from Truth inside of the Citadel. With Truth moments away from activating the Halo array, John-117 and the Arbiter temporarily ally themselves with the Flood and storm the Citadel. They shut down the Halo array, and the Arbiter executes Truth, finally ending the Human-Covenant War. The Human-Covenant War ends. The Flood immediately turn against John-117 and 'Vadam, but the pair escape. Soon after, it is discovered that the Ark's foundry has created Installation 08|a replacement for the destroyed Installation 04. Realizing that the ring could be used to fire a tactical pulse which would eliminate the Flood infestation, John-117 decides to light it. In order to do so, he enters the ruins of High Charity and recovers Cortana, who still possesses the Activation Index from the original Installation 04. High Charity is destroyed in the process. With the Index secure, John-117, Cortana, the Arbiter, and Sergeant Major Johnson travel to the replacement Installation 04, while the rest of the UNSC and Sangheili forces return to Earth on the ''Shadow of Intent''. In the control room, Johnson is killed as 343 Guilty Spark attempts to prevent him from activating the ring prematurely, as doing so would destroy the ring. John-117 destroys the monitor and begins the firing sequence for the Halo ring. John-117 and the Arbiter then escape the control room by taking Johnson's Warthog to the UNSC Frigate ''Forward Unto Dawn'', which is holding position nearby. Due to the unstable, incomplete nature of the ring as it fires, the slipspace portal collapses as the ''Dawn'' enters it, causing it to be sheared in two. The Halo ring explodes causing heavy damage to the Ark, rending both defunct. Cortana and John-117 are in the hangar area at the time of the Frigate's separation, and are thus left in the aft section of the ship, which falls out of Slipstream space at an unknown location, eventually drifting towards a Forerunner shield world, Requiem. December 14 000 Tragic Solitude orders his sentinels to begin the construction of a containment shield around the remains of High Charity for quarantine.Halo Wars 2, ''Phoenix Logs Idle Hands Part 2'' December 15 John-117 has an augmentation maintenance scheduled for this date. December 23 Arbiter Thel 'Vadam returns to Earth using the forward half of the ''Dawn'', crashing into the Indian Ocean. December 30 The ''Shadow of Intent'' is repaired and refitted at a mobile shipyard. December 31 Codename: SURGEON filed a report to Codename: USUAL SUSPECTS entitled "Historical/Psychological Analysis of Cole, Preston J." The report was filed from in synchronous orbit on the far side of Luna.Halo: Evolutions - ''The Impossible Life and the Possible Death of Preston J. Cole'', pages 413-487 Unknown date Unaware of the Human-Covenant War's conclusion not long earlier, the Spartan-II Gray Team destroy the Sangheili colony of Glyke with a NOVA bomb according to Operation: SUNSPEAR's Condition Endgame.Halo: Envoy, Chapter 4 Battles Human-Covenant War Battle of Beta Eridani Operation: FIRESIDE Battle of Fumirole Massacre of Troy Battle of Sigma Octanus IV Fall of Reach (Template:Engagements in the Fall of Reach|Engagements) Battle of Tribute Raid on Verge Battle of Beta Gabriel Battle of Line Installation 1-4 Battle of New Jerusalem Raid on Mount Haven Battle of Installation 04 (Template:Engagements in the Battle of Installation 04|Engagements) Massacre at Eridanus Secundus Operation: FIRST STRIKE Battle of Earth (Template:Engagements in the Battle for Earth|Engagements) Battle of Installation 05 (Template:Engagements in the Battle of Installation 05|Engagements) Onyx Conflict Battle of Mare Erythraeum Scramble onboard Forerunner Dreadnought Battle of Installation 00 (Template:Engagements in the Battle of Installation 00|Engagements) Operation: SUNSPEAR The Great Schism Fall of High Charity Other/Unknown''' Battle of October 10 Battle of the Gas Mine Trivia All five ''Halo'' games developed by Bungie take place in the latter half of this year. The numerical value of the year is one of Bungie's many references to the number seven. Specifically, adding the numerals results in 14, which has twice the value of 7. Adding the two halves of the year separately (2+5 and 5+2) results in a pair of sevens. Notes Sources

2553 was a year in the 2550s in the 26th century. It was the first year that saw relative peace for humanity as the Covenant ceased to exist following its collapse during the Great Schism and its Battle of the Citadel|defeat at the end of the Human-Covenant War. - ''"The Covenant are dead"'' The end of the war was formalized with a ceremony in March 2553 with a prior Treaty of 2552|treaty agreed upon between the Unified Earth Government and the Swords of Sanghelios in February 2553. Despite the end of large-scale hostilities and the absence of humanity being threatened with extinction, new factions sprung up in the power vacuum left behind by the ancient empire and new battles followed. 2553 was a year that saw the United Nations Space Command make major advances in terms of its technological prowess and military capability, despite a lesser reach over the galaxy incurred by the loss of so many colonies and assets during the decades of war. Ex-Covenant societies were faced with the challenge of redefining their purpose in a galaxy that no longer provided them with the rigid structure the hegemony had. Some sought revenge on humans and some on others from the Covenant. Some sought to be left alone and others made grabs for power. And some, such as Thel 'Vadam's Swords of Sanghelios, made in-roads with their former enemies for the mutual benefit of all parties. Events January 1 After days of no indications that they were soon to be rescued following the destruction of Glyke and the UNSC Vacuna, Gray Team enters cryostasis.Halo: Envoy, ''Chapter 12'' File:HI Ilsa and rebels.png|thumb|250px|January 2553: Ilsa Zane announces her intention to steal the ''Infinity''. Before January 7 At some point before January 7, Jun-A266 visits Sarah Palmer aboard Lockhart medical station|''Lockhart'' medical station to recruit her into the nascent SPARTAN-IV program.Halo: Initiation, ''Halo: Initiation Issue 1|Issue #1'' January 7 The first class of the SPARTAN-IV program, consisting of 145 volunteers, begin their augmentation procedures. January 8 The Unified Earth Government formally regains its power back from the United Nations Space Command. [January 8, 2553]. No notable adjustment in military [bureaucratic tactical] behavior and scope of authority.)''] The newly-elected President of the Unified Earth Government|president, Dr. Ruth Charet gives her inaugural address. January 15 An ONI agent known as Oberon 5 interrogates the San'Shyuum Alo Sebukah, former Ministry of Abnegation|Vice Minister of Abnegation for the Covenant, at the Midnight Facility.Halo Legendary Crate, ''Halo Legendary Crate/Data Drops|Data Drop #8'' January 26 The Office of Naval Intelligence black operations cell, Kilo-Five, is formed by CINCONI Admiral Margaret Parangosky. January 27 Kilo-Five departs Earth aboard the .Halo: Glasslands, ''page 79'' January 2731 The UNSC Security Council takes actions to address the state of human Human colonies|colonies. Lord Terrence Hood plans to journey on a diplomatic mission to surviving worlds in order to discuss plans for reconstruction. Kilo-Five supplies arms to the Servants of the Abiding Truth on New Llanelli in the Brunel system. The unit also retrieves an Office of Naval Intelligence spy, Mike Spenser, from a UNSC listening post on Reynes. Commander Musa Ghanem holds a meeting with several admirals at HIGHCOM Facility Bravo-6 to discuss the recent creation of the SPARTAN-IV program and the independent branch of the United Nations Space Command armed forces, Spartan Operations. January 31 Dr. William Arthur Iqbal sends a message to his colleagues concerning the ongoing study of Forerunner artifacts and the Portal at Voi|Excession in particular.Halo: Evolutions - Essential Tales of the Halo Universe, ''From the Office of Dr. William Arthur Iqbal'' File:HM-Crew of Onyx.jpg|200px|thumb|February 2553: The survivors of the Onyx Conflict within the shield world February 1 Jul 'Mdama joins Avu Med 'Telcam and the Servants of the Abiding Truth in their opposition to the Arbiter, Thel 'Vadam. February 3 John-117 had a psychological monitoring scheduled for this date. February 115 Terrence Hood arrives at Sanghelios to meet with Thel 'Vadam and to formalize a Treaty of 2552|treaty of peace between the Unified Earth Government and the Swords of Sanghelios. Hood also invites Thel to attend a Voi Memorial|memorial ceremony on Earth dedicated to those who died during the war. Lucy-B091 discovers a population of Huragok within Shield World 006 and the human survivors within the shield world are able to establish communications with the ONI ships prowling the debris field of Onyx. The Huragok bring the shield world into normal space from the slipspace bubble it was residing in, allowing ONI to retrieve Dr. Catherine Halsey, SCPO Franklin Mendez, and the Spartan-IIs and SPARTAN-IIIs of Blue Team. Dr. Halsey is arrested by Captain Serin Osman. ONI dispatches science teams to recover Forerunner technologies from the shield world, designating the sphere as Trevelyan|ONI Research Facility Trevelyan at Dr. Halsey's request. Jul 'Mdama is captured by Kilo-Five and is transported to ONIRF Trevelyan. February 15 Jun-A266 meets with Edward Buck on Sundown, where the latter had travelled with Veronica Dare for a vacation while on shore leave. Jun offers Buck the opportunity to join the SPARTAN-IV program. To Jun's surprise, Buck declines the offer, feeling that accepting would mean abandoning his team and Dare.Halo: New Blood, ''pages 49-55'' (Google Play edition) February 18 It is three days to Margaret Paragoskys birthday, and Serin Osman gifts her a Huragok. February 19 000 Tragic Solitude begins to research and catalog the myriad Flood forms and reflects on the uncomfortable truth the parasite exemplifies.Halo Wars 2, ''Phoenix Logs An Uncomfortable Truth Part 1'' February 21 Margaret Parangosky turns 92. February 28 The ''Shadow of Intent'' is stationed at Earth. File:HM-BloodingYears.jpg|300px|thumb|March 2553: The Servants of the Abiding Truth launch an attack on Kolaar Mountain. March 1 Admiral I. Zhou submits a full report of the URNA Southwest Campaign, labeled Sequence Log 03-0997.Halo Legendary Crate, ''Halo Legendary Crate/Data Drops|Data Drop #2'' March 2 John-117 had a interlace synchronization test scheduled for this date. March 3 In a ceremony presided over by Lord Hood, a Voi Memorial|monument is erected in the Kenyan savannah near Mount Kilimanjaro to officially mark the end of the Human-Covenant War and to remember those who gave their lives in it. After the ceremony, the ''Shadow of Intent'' departs for Sanghelios.Halo 3, campaign level ''Halo (Halo 3 level)#Eulogy|Halo'' Dr. Catherine Halsey is interrogated by Admiral Margaret Parangosky on Ivanoff Station. Dr. Halsey's personal journal is locked up after being analyzed by ONI. March 16 Evan Phillips is assigned to an intelligence-gathering mission on Sanghelios. Kilo-Five travels to Venezia and meets with Mike Spenser once again. An insurgent attack by Jiralhanae servants results in the death of dozens of Sangheili in Ontom on Sanghelios.Halo: The Thursday War, ''pages 22-23'' During the attack, Evan Phillips and a fragment of Black-Box make their way into the Temple of the Abiding Truth. Eventually, Phillips activates a slipspace translocation|translocation portal within the structure and is transported to Acroli. Kilo-Five arrives at Sanghelios to retrieve Phillips. Upon failing to find Phillips in Ontom, it tracks him to Nes'alun Keep, under attack by forces from the nearby Lacalu Keep. Phillips is rescued but the Sangheili in the keep are killed by the invaders. March 22 The is launched after receiving its final upgrades with Forerunner technology. Forces loyal to the Servants of the Abiding Truth launch an assault on Vadam, starting the Blooding Years.Halo: The Thursday War, ''page 28'' This attack is eventually repelled by the arrival of the UNSC ''Infinity''. During the battle, Jul 'Mdama's wife, Raia 'Mdama|Raia, is killed. Admiral Parangosky approves the deployment of an automated probe delivery craft to Installation 00 using advanced slipspace technology.Halo: Hunters in the Dark, Chapter 2 April 1 Jul 'Mdama escapes captivity on Trevelyan via a slipspace portal. He is transported to Hesduros, where he is welcomed by the local Sangheili as a messenger of the gods. Jul uses the locals' religious devotion to his own advantage and the result is the start of a Jul 'Mdama's Covenant|new faction devoted to Covenant ideals. April 5 Kilo-Five returns to Venezia in order to track down the Kig-Yar pirate, Sav Fel, and the insurrectionist, Staffan Sentzke. Serin Osman is promoted to Rear admiral (lower half)|Rear Admiral and a small party is held aboard ''Port Stanley'' in her honor by Kilo-Five. April 14 Sav Fel sells the ''Pious Inquisitor'' to Staffan Sentzke, who intends to use the ship to force UEG authorities to provide answers about the disappearance of Naomi-010|his daughter many years earlier. Fel demonstrates the ship's capabilities by using its energy projector to glass Forerunner ruins on Shaps III.Halo: Last Light, ''pages 22-23'' (Google Play edition) This causes Line Installation 444-447 to send an automated distress signal to Covert Support Base 4276, located on planet Gao in the nearby Cordoba system. The distress call awakens the support base's , Intrepid Eye, from stasis. After her requests for a status report, Intrepid Eye attempts to launch a reconnaissance drone, triggering a cave-in which cripples Support Base 4276 almost entirely.Halo: Last Light, ''pages 36-39'' (Google Play edition) Vasily Beloi and Malcolm Geffen infiltrate the Venezian militia in order to gather information about Sentzke and ''Pious Inquisitor''. Following a series of suspicious incidents, Sentzke begins to doubt their cover story and has them detained and tortured. Naomi-010 and Lian Devereaux eventually arrive and successfully extract Mal and Vaz. During the rescue, Sentzke is also taken captive aboard ''Port Stanley''. A Kig-Yar crew led by Shipmistress Chol Von tracks down and boards ''Pious Inquisitor'' with the intent of seizing the ship for itself. Kilo-Five boards ''Pious Inquisitor'' and a skirmish occurs between it and the Kig-Yar. Chol Von eventually has her crew destroy the ship. Staffan Sentzke is presumed dead in the ensuing explosion, but he actually had managed to escape. Several tourists exploring Gao's Montero Cave System find themselves miraculously cured of various illnesses and the caves quickly see an influx of sick people hoping for similar miracle cures.Halo: Last Light, ''pages 8-10'' (Google Play edition) The cures are actually the work of the Lifeworker Huragok Roams Alone, attached to Gao's Support Base 4276. Commander Murtag Nelson, a field analyst at an ONI listening post, takes note of strange transmissions emanating from the Montero Cave System on Gao. Nelson correctly hypothesizes that a Forerunner ancilla is responding to the bombardment on Shaps III. Admiral Parangosky subsequently gives Nelson command of the 717th Xeno-Materials Exploitation Battalion and tasks them with retrieving the Forerunner AI. May ONI's Materials Group forms the UNSC Ordnance Commission|Damascus Ordnance Commission, headed by major defense companies and sponsored by ONI.Halo Mythos, ''page 128'' The commission places several conditions on the use of MJOLNIR Powered Assault Armor (GEN2)|MJOLNIR GEN2 variants.Halo 4: The Essential Visual Guide May 6 ONI learns the Banished had raided an air base formerly belonging to the Covenant, and that its leader, Atriox, had been captured and taken aboard the assault carrier ''Enduring Conviction''. Twelve hours later, the ''Enduring Conviction'' broke formation and contact with the rest of its fleet. The ''Conviction'' was hailed, warned, and then fired upon when it ignored orders. The ship performed evasive maneuvers, returned fire and escaped. Shortly after this, the ship and its crew, led by Let 'Volir, swore fealty to the Banished.Halo Wars 2, ''Phoenix Logs Rise of Atriox III'' May 7 The research and development vessel ''Argent Moon'' is commissioned by ONI. May 14 ''(approximately)'' A UNSC task force enters the Cordoba system and requests permission to conduct research in Gao's Montero Cave System. While Gao Republic|Gao's planetary government initially denies the requests, Tejo Aponte|President Aponte eventually allows a small research team to land. The UNSC subsequently deploys the 717th Xeno-Materials Exploitation Battalion, along with the attached Blue Team, to the Montero region and declares the caverns off-limits to anyone else. After the UNSC battalion's arrival, several people are found brutally murdered in the Montero Cave System. The murders are the work of the Forerunner ancilla Intrepid Eye, who seeks to generate conflict among the humans in order to force the UNSC to cease its efforts to capture her. June A man named W. B. Eton becomes the handler of Catherine Halsey's personal journal and later sends it to someone who was involved in Operation: WHITE GLOVE. File:HM-Gao.png|thumb|250px|July 45, 2553: The Battle of Wendosa. July 2 The Gao Ministry of Protection's Special Inspector Veta Lopis and her team investigates the recent murders in the Montero Cave System.Halo: Last Light, ''pages 5-6'' (Google Play edition) The Huragok, Roams Alone, is spotted and attacked by the UNSC marine, Private Hayes. Intrepid Eye kills he and Major Ira Halal and discovers a fragment of Wendell, an AI created specifically for Operation: JOVIAN WHISTLE. Veta Lopis learns that the UNSC's investigation on the planet concerns a Forerunner ancilla. Gao Minister of Protection Arlo Casille meets with the dokab Castor of the Keepers of the One Freedom and Reza Linberk of the Venezian militia to plan a coup against President of the Gao Republic|President Tejo Aponte. July 3 Members of Blue Team accompany Lopis and her partner, Cirilo in a search for the missing Halal and Hayes. They arrive at their location and discover their corpses. Fred recovers the fragment of Wendell from Halal's damaged TACPAD and places him in his helmet's data chip. While investigating the scene, Cirilo finds a trail of blood from Roams Alone and the team resolves to follow it. July 4 Intrepid Eye directs Aggressor Sentinels to attack the humans and though they destroy the Sentinels, Cirilo is killed and Olivia-G291's legs are badly wounded. Veta Lopis learns of SPARTAN-III Gamma Company|Gamma Company's Project CHRYSANTHEMUM|unique augmentations and places them, Mark-G313 in particular, at the top of her list of suspects for the murders. The humans are met by Roams Alone, who they agree to take with them back to the surface. The Keepers launch Battle of Wendosa|an attack on Wendosa, believing that Intrepid Eye is in the town. The group also dispatches forces into the caverns which come into conflict with Veta and the Spartans. July 5 Fred-104 captures Intrepid Eye with a scramble grenade. The ancilla escapes and is pursued by the UNSC and Keepers alike and is eventually recaptured by he, Olivia, and Ash. Fred boards a UH-144 Falcon with the ancilla but is shot down. Veta Lopis attacks Castor and wounds him before the Jiralhanae can harm Fred. The 717th Xeno-Materials Exploitation Battalion's Alpha Company arrives at their location to fend off the Keepers. July 6 Blue Team destroys Covert Support Base 4276 with a HAVOK tactical nuclear weapon, having successfully captured the Forerunner ancilla Intrepid Eye. With the UNSC forces withdrawing and the majority of the Keepers of the One Freedom task force killed, the Operation: JOVIAN WHISTLE|situation on Gao is stabilized; however, the colony is left under a staunchly anti-UEG administration headed by President Arlo Casille.Halo: Last Light, Chapter 28 Spartans Ash-G099, Olivia-G291, and Mark-G313 are reassigned to an ONI Ferret unit led by Veta Lopis, Admiral Parangosky having deemed public knowledge of SPARTAN-III Gamma Company|Gamma Company's Project CHRYSANTHEMUM|brain mutations too dangerous.Halo: Last Light, Chapter 28, ''pages 330-331'' (Google Play edition) August Spartans Lucy-B091 and Tom-B292 are assigned to Spartan Operations. File:HM - SOI.jpg|thumb|200px|September 2553: Tem'Bhetek engages Rtas 'Vadum and Tul 'Juran aboard the ''Shadow of Intent''. September The official status of Ash-G099, Olivia-G291, and Mark-G313 is changed to killed in action during Operation: JOVIAN WHISTLE as part of the ONI cover-up of Gamma Company. The San'Shyuum prelates|prelate, Tem'Bhetek, and the Ministry of Preparation|Minister of Preparation, Boru'a'Neem, seek revenge against the Sangheili for the losses they incurred during the Great Schism. They hatch a plot to use a prototype Halo installation to commit genocide on Sanghelios. Blaming Rtas 'Vadum personally for the loss of his wife, the prelate attempts to draw him in so he can capture his ship by attacking two Sangheili colonies, Rahnelo and Duraan. The efforts of the San'shyuum are thwarted by 'Vadum and the crew of the ''Shadow of Intent'' and Tem realizes that he has been lied to and used by the Minister of Preparation. He ultimately gives his life to destroy the Halo ring.Halo: Shadow of Intent, ''pages 79-80'' (Google Play edition) October 14 Veta Lopis and her Ferret Team are stationed at UNSC Recreational Facility 6055-NA-A on Neos Atlantis to participate in a training exercise that turns into a fight for their lives as they fall under attack by Dark Moon Enterprises. However, with Spencer Hume and Ota Gallo dead, ONI is able to avert a crippling public relations crisis.Halo: Fractures, "A Necessary Truth" November 23 Around 1419 hours, Damon, a fifth generation Dumb AI|"dumb" Class-L UNSC Defense Force|military artificial intelligence, is created.Halo: Retribution, chapter 4 November 28 Luther Mann, while exploring Trevelyan, discovers the location of Installation 07.https://twitter.com/bsangel/status/670658429149540352, ''Today in Halo'' A pioneer group arrives at Reach to prepare for the planet's eventual reterraforming. The ONI probe delivery drone dispatched in March arrives at Installation 00 and deploys its probes. After initial transmissions confirm the Ark's survival, all of the probes go offline. December 6 Vice Admiral Graselyn Tuwa is discovered killed aboard the , with her family having been abducted. December 8 The Office of Naval Intelligence sends Veta Lopis' Ferret Team to find her killer and rescue her family. December 12 Office of Naval Intelligence operative Veta Lopis and her team of Spartan-III Ferrets are present at Trattoria Georgi in New Tyne, Venezia, as part of a mission.''Halo: Retribution'' ''Chapter 1'' December 21 Two ONI agents, 'D' and 'S', speculate which are Atriox's motivations after the demise of the Covenant empire.Halo Wars 2 - ''Phoenix Logs: Rise of Atriox IV'' The UNSC commissions the , a ship equipped with state-of-the-art Forerunner slipspace drive technology, remote contact teams and survey drones, for a manned mission to the Ark. Manufactured by SinoViet Heavy Machinery, the enters service. The MJOLNIR Powered Assault Armor (GEN2) enters into service. Gabriel Thorne's grandfather dies.Halo: Escalation - ''Issue #7'' Big M Studio, a company that deals with collectible items and replicas, is established.Halo: Reach Legendary Edition - ''Noble team Statue Instructions'' Holly Tanaka and two other survivors from Minab's glassing are rescued by the UNSC.Halo: Escalation - ''Issue #17'' The UNSC Navy takes inventory of its remaining fleet assets; all surviving warships are recalled to the Sol system. The UNSC Navy has been reduced to a fleet of several hundred vessels as plans for reconstruction are immediately enacted.Halo Mythos, p. 132 Before May 2553, a iteration of the ENFORCER-class Mjolnir passed tests per the Ankara Field Stricture BL58-0.Halo 4: The Essential Visual Guide ''- Page 152'' At some point before the ship's official launch, a New Colonial Alliance strike force led by Ilsa Zane Raid on UNSC Infinity|infiltrates the and briefly commandeers the flagship, but is defeated by the five Spartan-IVs aboard the vessel at the time.Halo: Initiation, ''Halo: Initiation Issue 3|Issue #3'' The Smart AI Leonidas is created around this year.Halo: Bad Blood The M510 Mammoth,Halo: Official Spartan Field Manual, ''page 202'' the AV-49 Wasp,Halo: Official Spartan Field Manual, ''page 204'' and the STINGER-class Mjolnir are introduced. Gudam Keschun is born. A new type of Banished dreadnought|dreadnought is manufactured by Irusk Workshop and integrated into the Banished fleet. Sources

2554 was a year in the 2550s in the 26th century. Events January 3 Insurrectionist forces of the United Rebel Front unsuccessfully attempt to Draco III rebellion|invade and occupy Draco III's rebuilt capital of New Albany, resulting in a prolonged standoff between themselves and the UEG. Standoff results in the death of all insurgents but at least Jonathan Doherty|one UNSC soldier who was being held hostage was killed. March 29 An Spartan-IV station terror attack|incident occurs on Spartan-IV Training Station|a space station operated by the SPARTAN-IV program as a training facility, beginning with the murder of Spartan-IV trainee Hideo Wakahisa by fellow Spartan candidate Rudolf Schein, now working as an agent of the United Rebel Front. Schein subsequently attempts to destroy the station with explosives, though Musa-096 and Jun-A266 are able to stop him; however, O'Day|Captain O'Day is killed in the process, while Jun and Schein are propelled into space through a Hull breach|breached viewport. Jun is rescued on time by Lucy-B091 and Tom-B292 while Schein is left to die in the vacuum of space, with the three Spartan-IIIs receiving medical treatment for several days for their vacuum exposure.Halo: Fractures, ''"Lessons Learned"'' Unknown date Shortly after Schein's failed Terrorism|terrorist attack, Tom-B292 and Lucy-B091 are reassigned from their duties as Spartan-IV instructors to serve under Franklin Mendez as part of the security staff of the Onyx United Research Project on Shield World 006. April 15 Edward Buck, Kojo Agu, and Michael Crespo formally complete their induction as Spartan-IVs. April 22 ''Shadow of Intent'' is rendered combat ineffective after a battle with Jul 'Mdama's forces. August 10 arrives at the ruins of Installation 00 and deploys several remote contact teams (RCTs) to the Ark's surface.Eleventh Hour reports, Report #4 ''Provenance'' August 18 After 8.3 days, all contact with the RCTs is severed, after being attacked by the installation's fauna and constructs. Only RCT-06 returns to the prowler, having suffered extensive casualties. However, they bring the source of the signal aboard: the remains of the monitor 343 Guilty Spark. After properly calibrating their AI translator, the human team began to interrogate Spark, hoping to gain insight into the ancient human-Forerunner relations and Ur-Didact|the Didact.Halo: Primordium, ''pages 11-13'' Spark, acknowledging the humans as "the true Reclaimers"Halo: Primordium, ''page 371'' proceeds to describe the events that led to Chakas|his former human self becoming a monitor. August 21 After Spark finishes his story, his robotic shell powers down and is jettisoned into space by order of the ONI team commander. Having successfully uploaded his data stream into the ship's computers, however, Spark disables ''Rubicons Curator|AI and takes full control of the vessel. Having come to the conclusion that the Librarian is alive as a result of long study, and that he has need for the ship and its crew, Spark puts them to sleep and sets course to where he believes the Lifeshaper could be found.Halo: Primordium, ''pages 376-379''Halo Mythos Bobby Kodiak, the only survivor of the RCT Broadside, is "saved" and converted into a cyborg by 000 Tragic Solitude after surrendering himself to the AI.Halo: Hunters in the Dark, ''pages 5-8'' (Google Play edition) November 21 Indrid Lota dies on Aleria. December 15 Catherine Halsey|Dr. Catherine Halsey, working on Ivanoff Station, files an Audio log (Halo 4)|audio log regarding the discovery of the Composer on the nearby Installation 03 and is fascinated by the similarities between the Forerunner device and the UNSC's Smart AI#Creation|AI matrix compiler.Halo 4, campaign level ''Composer (level)|Composer'', Audio log (Halo 4)|Audio log'' Manufactured by SinoViet Heavy Machinery, the enters service. Jul 'Mdama and Jul 'Mdama's Covenant|his followers find the shield world Requiem. They attempt to gain entrance to the shield world but are unsuccessful until 2557. The United Nations Space Command's Budgetary Retention Hearings of 2554 are held.Halo 4 Interactive Guide Tedra Grant visits Earth for the first time.Halo: Escalation, ''Issue #7'' The Battle of Draetheus V takes place as Merg Vol's Covenant attack Draetheus V. The battle sees significant losses on both sides and Draetheus V itself is nearly destroyed when Merg Vol's activates X50. The main hostilities conclude with Spartan Sarah Palmer killing Vol and sabotaging X50's main weapon, bringing Vol's Covenant's quest to a halt. Some time after the battle, Vol's Covenant return when a looping Forerunner code begins emanating from X50.Halo: Spartan Assault, ''Mission 26: Battle at the Arid Sea|Battle at the Arid Sea'' After arriving at the source of the signal, Spartan Palmer discovers that the source is the remains of Spartan Edward Davis.Halo: Spartan Assault - ''Mission 30: The Source'' The Alerian mining union Mols'Desias is dissolved. Silas Lota dies shortly after.Halo: Nightfall, ''Halo: Nightfall: ONI: Trade Barriers|ONI: Trade Barriers'' Jordan Gaines is transferred from the UNSC Air Force to ONI Section One. The Concord incident takes place, involving the use of outer-plated Mjolnir armor legs by Spartan-IVs.Halo 4, ''Outer-plated'' legs description A recolonization support fleet of the UEG arrives to Alluvion, discovering a strange anomaly under the planet's Sundark Sea; Forerunner shield pylons, which emerged and forced back massive walls of water revealing the seafloor. Fathom Station is commissioned by Imbrium Machine Complex and designed to locate the crash sites of ''Splendid Intention'' and . Naphtali Contractor Corporation took control over the EOD-class Mjolnir production.Halo 4 The ' and the twin Kig-Yar-helmed Mutan Et-pattern storm cutter|storm cutters ''Mark of Prophecy'' and ''Divine Breath'' engage each other near New Carthage. The F-41 Broadsword|F-41E Broadsword enters service with the UNSC, featuring several improvements over the original F-41 Broadsword.Halo: Warfleet, pp 28-29 Sources

2555 was a year in the 2550s in the 26th century. Events January 14 000 Tragic Solitude questions about the Forerunners' choice of the humans being their successors, and the galaxy repeating the same cycle over and over again, deciding to return the Installation 00 to its former glory, whatever the cost to the other races of the galaxy.Halo Wars 2 - ''Phoenix Logs: The Snake that Eats the Tail'' March 8 At 0900 hours, Dr. Luther Mann discovers a timer on Installation 07 evidently counting down to the Halo's activation in five weeks. Similar countdowns are reported on the other intact Halos. It is deduced that the activation could only have been triggered from Installation 00.Halo: Hunters in the Dark, Chapter 2 March 17 In response to the activation timer on Installation 07 being activated, Operation: FAR STORM begins with a joint human-Sangheili force is sent to the Ark on a covert operation to stop the activation sequence. March 20 Operation: FAR STORM is completed with the deactivation of Halo's priming sequence and the destructon of 000 Tragic Solitude. May 6 The Office of Naval Intelligence discovers about Atriox's origins after interrogating a Sangheili prisoner.Halo Wars 2 - ''Phoenix Logs: Rise of Atriox V'' Unknown date Huragok Quick to Adjust and his human handler Sadie Endesha are captured by United Rebel Front soldiers on Talitsa. A Alpha-Nine|team of Spartan-IVs is sent to rescue them and ultimately succeeds in their mission. Spartan Michael Crespo is detained by Spartans Edward Buck|Buck and Kojo Agu|Agu following the former's defection to the URF.''Halo: New Blood'' Manufactured by Aerofabrique SA, the enters service. The is catalogued by the UNSC. Auriga Station is commissioned by Lethbridge Industrial. The M6H magnum is adopted as the UNSC's primary sidearm. Tomas Navarro enters UNSC service.Believe, ''Enemy Weapon'' Hannibal Weapon Systems takes over production of the ROGUE-class Mjolnir|MJOLNIR Rogue variant. Installation 07 is discovered by Dr. Luther Mann from data found on Trevelyan. An ONI research detachment, including Dr. Mann, is subsequently dispatched to study the installation.Halo: Hunters in the Dark, Chapter 1 Jameson Locke|Lieutenant Commander Jameson Locke's Locke's team|special operations team arrives at Misriah Armory at Wikipedia:Eos Chasma|Eos Chasma on Mars. Locke reviews ONI Eyes files procured from Sedra.Halo: Nightfall, ''Halo: Nightfall: Seed of Honor|Seed of Honor'' Late in the year an automated UNSC scout vehicle, Recon-14, begins transmitting from Alpha Shard, piquing the interests of the Office of Naval Intelligence. The probe continues to document the surface of the ring's fragment, reporting all noted anomalies to ONI. These transmissions are analyzed by several ONI specialists, including Doctor Madeline Tress. Recon-14 detects a group of Thanolekgolo eels below the shard's surface. When the probe ventures to investigate the eels, the abnormally aggressive Lekgolo attack it. The heavily damaged Recon-14 succeeds in transmitting its final recordings to ONI before being destroyed by the Thanolekgolo.Halo: Nightfall, ''Halo: Nightfall: RECON-14|RECON-14'' ONI stops manufacturing the Z-4190 bubble shield, refocusing its shield research efforts towards Mjolnir-compatible emitters. Operation: FOCUS LENS 2555, a simulated second Battle of Earth|Covenant invasion of the Sol system and a joint service exercise between the UNSC Army and another branch of the United Nations Space Command armed forces, is conducted on Mars.Halo 5: Guardians Limited Edition Sources

2556 was a year in the 2550s in the 26th century. Events January 24 Border security at Checkpoint Rhoen on Sedra is forced to enact eight seizures on incoming ships. One of these raids yields highly refined fissile material. Laban Neir requests for an increase in equipment and personnel.Halo: Nightfall, ''Halo: Nightfall: Rhoen Border Security|Rhoen Border Security'' February 3 Checkpoint Rhoen is given management of planetary access in sectors four, five, and seven after two Office of Naval Intelligence D79-TC Pelicans are sent to Sedra. Upon arrival, the ONI unit asks for twenty-five percent of Sedran Colonial Guard assets to aid them in their operations.Halo: Nightfall, ''Halo: Nightfall: Quartermaster|Quartermaster'' February 7 Sedra City is Terrorist attack on Sedra City|attacked by a Sangheili terrorist.Halo: Nightfall Jameson Locke|Lieutenant Commander Jameson Locke's Locke's team|team and the Sedran Colonial Guard conduct a Mission to Alpha Shard|mission to Alpha Shard. Only Locke and Talitha Macer|Macer survive. Locke is later recruited into the SPARTAN-IV program, and is assigned to sensitive operations in the Outer Colonies.Halo 5: Guardians Limited Edition 1600 hours: Ader Haddak transmits a report about the attack.Halo: Nightfall: ONI: Compliance March Scientist and test pilot Anarosa Carmelo is killed in an accident. The smart AI, Isabel, is Cognitive Impression Modeling|created from her brain shortly afterward.Halo: Fractures, "Anarosa" March 16 Smart AI Isabel is activated. July 12 Melody Azikiwe and the artificial intelligence construct, Adalbert, translate recorded conversations found within the black-box recovered from the Covenant , ''Undiminished Entelechy''. September 25 ''Believe (event)|Believe'', a musical event performed by the UNSC Symphony Orchestra, takes place at the UNSC Symphony Hall at 1930 hours. It is centered on remembering John-117|Master Chief Petty Officer John-117 and his service to the United Nations Space Command|UNSC.:File:Believe Ad.jpg|Believe advertisement October 31 R. Dellert sends a message to Terrence Hood as part of an ongoing conversation between the two concerning interspecies relations. In it, he lets Hood know that he has learned of an operation wherein Fireteam Apollo was deployed to the exclusion zone around Threshold in violation of the Treaty of 2552. Dellert advises Hood to confront Admiral Margaret Parangosky about the matter. He also sends Hood data in the form of a translated conversation between Thel 'Vadamee and the Prophet of Stewardship that was recovered from the black-box of ''Undiminished Entelechy'' by Apollo.Halo Legendary Crate, ''Halo Legendary Crate/Data Drops|Data Drop #3'' November 6 The ''Shadow of Intent'' returns to active duty, accompanied by unidentified logistical support craft, to pacify Covenant remnants|rogue faction forces in the Urs system. After November 7 On board the , Cortana, showing clear signs of rampancy, files a report on the history of the Forerunners and humanity.Halo Legends, ''Origins'' December Rion Forge participates in a four-way bidding war for a small piece of a Forerunner navigational databoard at a small bazaar on Komoya. After winning the bidding war, she sells it for a large profit, despite the damage the device had sustained.Halo: Fractures, ''Into the Fire'' Cleyell is Glassing|glassed by a Covenant remnants|remnant of the Covenant. The deploys Army and Marine search-and-rescue teams led by Sergeant Holly Tanaka to relieve the stranded colonists on the surface.Halo: Escalation, ''Halo: Escalation Issue 17|Issue #17 After the mission, Captain French (Captain)|French recommends Tanaka to the SPARTAN-IV program. She is recruited shortly after by Jun-A266.Halo: Escalation, ''Halo: Escalation Issue 18|Issue #18 The MLRS-1 Hydra enters service. The Twin-plated forearms are used for the first time with the MJOLNIR Powered Assault Armor (GEN2), after being prototyped with (GEN1) years ago.Halo 4, ''Twin-plated'' forearms description A complete withdrawal of Forerunner shield pylons on Alluvion's Sundark Sea causes the sea to collapse on those who remained within the Liang Dortmund's Alluvion Research Center. During a routine search conducted on Beta Gabriel's Cortez Ocean, the crashed Covenant carrier ''Splendid Intention'''s remains suddenly shift from its resting place in the Aleutian Rim and violently slide down a nearby trench, sending debris and water in Fathom Station's northern terminal, tearing the complex apart, and killing forty-one researchers. ''Splendid Intention'' and the twenty-three explorers trapped inside the carrier are lost, and operations at Fathom Station are discontinued. Sources

2557 was a year in the 2550s in the 26th century. Events January Rion Forge and her crew aboard the ''Ace of Spades'' discover the wreckage of the on Eiro.Halo: Fractures, ''Into the Fire'', ''page 289'' The ''Ace of Spades'' and her crew investigate the wreckage of the ''Radiant Perception'' and rescue Ram Chalva from Gek 'Lhar on Laconia.''Halo: Smoke and Shadow'' Rion's crew faces off with Gek 'Lhar and his Sangheili in the debris field of Trove. Cade is killed and Little Bit|what remains of the shield world's ancilla is recovered by the ''Ace of Spades'' crew. February 2 ''Shadow of Intent'' leaves the Urs system for a diplomatic mission in former Covenant territory. February 21 is commissioned into service.Halo 4, ''The Commissioning''Halo 4 Limited Edition ''Infinity Briefing Packet'' March 3 An accident involving experimental weaponry aboard ''Argent Moon'' causes a gaseous toxic substance to spread throughout the ship via its air systems, killing nearly all aboard. Those closer to the accident are killed instantly and, depending on distance from the accident, the rest of the vessel's personnel begin suffering symptoms from the chemical minutes or hours later.Halo 5: Guardians, campaign level, ''Blue Team (level)|Blue Team'' - Mission Intel March 17 All ''Argent Moon'' crew is killed by the biological agent, with only the shipboard AI, Rooker, still active. As a result, ONI loses contact with ''Argent Moon'' and Rooker sends a message that warns any ONI personnel who board the station of the situation, then puts the ship on a course that keeps it away from all inhabited systems and jettisons what remains he can into open space. May 6 to June 1 ''Shadow of Intent'' participates in naval exercises with the UNSC Navy in a Joint Occupation Zone. After this, the ship is tasked with the protection of Sanghelios and Sangheili colonies. June 8 At 0221 hours, the Mission to the Korinth Prior system|arrives in the Korinth Prior system near the accretion disk created by the remains of Trove.Halo Legendary Crate, ''Halo Legendary Crate/Data Drops|Data Drop #4'' June 21 At 0550 hours, After Action Report Q74S295-LR concerning the mission to the Korinth Prior system is sent by the artificial intelligence, Turkish, to Hugo Barton. July 2 , an ONI vessel sent to reconnoiter Installation 00 in late 2553, is officially declared lost. July 21 Having tried in vain for 2554|three years, Jul 'Mdama's Covenant faction finally gain access to the shield world Requiem; Shipmaster Jul 'Mdama orders his forces to board to keep the ship from landing on Requiem. Aboard the ''Forward Unto Dawn'', Cortana wakes John-117 from his cryotube and warns him of the intruders. Once off the UNSC frigate|frigate, they are forcibly pulled into the artificial planet.Halo 4, campaign level ''Dawn'' John-117 and Cortana engage 'Mdama's Covenant forces on Requiem while attempting to find a way back to UNSC-controlled space. Meanwhile, is approaching Requiem, oblivious of the Gravity well (physics)|gravity well which pulled the ''Dawn'' and many Covenant ships inside. While attempting to clear the communications interference preventing them from contacting ''Infinity'', John-117 and Cortana are attacked by mechanical Promethean forces. Activating a supposed broadcast relay in Requiem's core, John-117 instead accidentally releases the Ur-Didact|Didact from imprisonment. Bent on preventing human ascendance, the Didact leaves immediately and joins forces with Jul 'Mdama's Covenant.Halo 4, campaign level ''Forerunner (level)|Forerunner'' UNSC ''Infinity'' crashes on Requiem. The Didact makes for the crash-site, followed by the Master Chief, who reunites with the UNSC for the first time in years and assists in the defense of the stranded ''Infinity'', eventually driving back the Didact and 'Mdama's Covenant forces. Afterwards, Captain (Navy)|Captain Andrew Del Rio has a difference of opinion with the Master Chief on whether or not they should leave Requiem, or stay and deal with the Didact.Halo 4, campaign level ''Infinity (Halo 4 level)|Infinity''Halo Legendary Crate ''- Halo Legendary Crate/Data Drops|Data Drop #7'' Del Rio orders the Chief to join Gypsy Company and destroy Requiem's Gravity well|gravity well generator so that the ''Infinity'' can depart.Halo 4, campaign level ''Reclaimer (level)|Reclaimer'' *During the mission, John-117 encounters a vision of the Librarian, who warns him of the Didact's true plan: to use a machine known as the Composer to neutralize humanity once and for all. To fight the Didact, the Librarian provides the Spartan with additional genetic enhancements, including an immunity to the Composer. Once the gravity well is destroyed, Captain Del Rio orders the ''Infinity'' to leave Requiem immediately. Disobeying orders, the Master Chief stays behind in an effort to stop the Didact. Between July 22-July 23 After the ''Infinity'' returns to Earth, UNSC Fleet Command|FLEETCOM immediately relieves Captain Del Rio of his duties as captain of the ship due to his actions on Requiem; Thomas Lasky is promoted in his place.Halo 4, campaign level ''Midnight'' Between July 22-July 24 The Didact repeatedly contacts Catalog and requests authorization to take control of the ecumene; Catalog rejects his requests. July 24 Raid on Ivanoff Station: John-117 pursues the Didact as he travels to ''Ivanoff Station'' to acquire the Composer. The Didact is eventually successful and uses the Composer to digitize the occupants of ''Ivanoff'', save for John-117 who is saved by the Librarian's enhancements.Halo 4, campaign level ''Composer (level)|Composer''Halo: Escalation - ''Halo: Escalation Issue 8|Issue #8'' SPARTAN-II Black Team, assigned as security for a science camp on Installation 03, loses contact with ''Ivanoff Station'' immediately after the attack.Halo: Escalation - ''Halo: Escalation Issue 9|Issue #9'' July 25 New Phoenix Incident: As the Didact plans to attack Earth and wipe out humanity using the Composer, John-117 follows him in close pursuit. When the Didact reaches Earth, the ''Infinity'' and the UNSC Home Fleet engage his ship immediately. Armed with a HAVOK tactical nuclear weapon|nuclear device, John-117 makes his way into the ship and confronts the Didact, but not before the Forerunner uses the Composer to digitize the entire population of New Phoenix, United Republic of North America|URNA. With the aid of a rampant Cortana, the Master Chief is eventually able to defeat the Didact, who falls into a slipspace rupture generated underneath the Composer. The Master Chief then destroys the ship with the nuclear device. Cortana sacrifices herself to save John-117 from the explosion and the Spartan is recovered from the debris field soon after. Unknown to everyone, Cortana survives with the debris of the ''Mantle's Approach'' and is pulled through slipspace to the Forerunner installation designated Genesis. There, she gains access to the Domain which "cures" her rampancy. Cortana meets with the Warden Eternal and both begin to plan to take the Mantle of Responsibility for the AIs.Halo 5: Guardians, campaign level ''Reunion'' After falling into the Composer's slipspace rupture, the Didact is thrown to the surface of Installation 03 along with other detritus from ''Mantle's Approach''. On Gamma Halo, the Didact awakens and brutally kills Team Black and the nearby UNSC science team. A group of SPARTAN-IV program|SPARTAN-IV recruits is deployed offworld at the time of the attack. A service portal opens between the Composer's Abyss on Installation 03 and the Composer's Forge. The latter's monitor, 859 Static Carillon, attempts to contact the Halo's caretaker, 049 Abject Testament, but receives no response. Static Carillon travels through the portal to Installation 03, where he meets the Didact who asks to be taken to the Composer's Forge. John-117 is debriefed by the UNSC Security Council about the Didact and the loss of Cortana. The Council decides to tell the public that the attack was carried out by the Covenant remnants and it was stopped by Master Chief. Terrence Hood|Fleet Admiral Terrence Hood informs John-117 about the loss of contact with the Installation 03 science team an hour earlier, and that the attackers may have been Prometheans. John reunites with Blue Team Frederic-104, Kelly-087 and Linda-058 and deploys immediately to Gamma Halo. July 26 After arriving at Gamma Halo, Blue Team find the bodies of the deceased science team and Team Black. After a short firefight with Promethean Knights, Blue Team discovers the former location of the Composer. Upon entering the structure, the Spartans discover the Composer's Abyss, at the end of which they find the slipspace portal leading to the Composer's Forge. Blue Team enter the portal to the Composer's Forge where they discover six Composers. The Didact confronts the Spartans along with a newly-created army of Promethean constructs. During the ensuing battle, Static Carillon transports Installation 03 above the Composer's Forge as part of an agreement between himself and the Didact. The Didact takes one of the Composers and departs for Gamma Halo, planning to use the ring to wipe out humanity. However, the monitor feels betrayed by the Didact bringing his "abominations" to the Composer's Forge and helps Blue Team return to the portal in pursuit of the Didact, intending to close the portal behind them. As Blue Team returns to the surface of Gamma Halo, they are attacked and easily subdued by the Didact. Before the Forerunner can execute the Spartans, 859 Static Carillon appears, disables the Didact and teleports him into the Halo's Control Room (Installation 03)|control room. John-117 follows the Didact into the control center where he enables Static Carillon to eject the segment of the ring housing the control room. The detached section of the Halo plunges into the Composer's Forge; the Didact is consumed by the ensuing blast while the Master Chief is safely teleported aboard Blue Team's Longsword in orbit.Halo: Escalation - ''Halo: Escalation Issue 10|Issue #10'' July 24-July 26 Battle of Installation 03: Jul 'Mdama's Covenant assault Installation 03 and take control of the site known as the Altar in order to use the Conduit to enable a massive Promethean invasion of the Halo through slipspace portals. However, a Spartan unidentified Headhunter|Headhunter assaults the Altar and obtains the Conduit.Halo: Spartan Strike, ''Operation C: Valiant Hammer'' Battle of New Phoenix: Shortly after the composition of New Phoenix, 'Mdama's Covenant open portals in New Phoenix ONI facility|an ONI base in the city through a unidentified Forerunner machine|Forerunner artifact stored there with the intent of launching an all-out invasion of Earth. The UNSC is able to stop the attack using the Conduit.Halo: Spartan Strike, ''Operation D: Adamantine Shield'' 859 Static Carillon takes Installation 03 to an unknown location for repairs. July 27 Blue Team returns to Earth; John-117 is debriefed by Admiral Hood, who congratulates him on defeating the Didact. However, the Master Chief believes the Didact is not dead, but merely "contained". While Hood suggests that he and Blue Team stand down and have some rest, the Master Chief instead leads the team on a new mission. September 12 Rooker begins to suffer from rampancy due to being six months past his "expiration date". Feeling he can no longer manage the ''Argent Moon'', he initiates his own destruction. September 26 Two months after Cortana's supposed death, Beta-5 Division operative Sapphire Three interviews John-117 regarding his visions of and interactions with the AI in late 2552.Halo Legendary Crate, ''Halo Legendary Crate/Data Drops|Data Drop #9'' November 15 The holiday known as "Yanumas" is celebrated for the first time. December 5 Roland becomes ''Infinitys primary shipboard Artificial intelligence|AI.Halo 4: The Essential Visual Guide Gek 'Lhar carries out a Terrorism|terrorist attack on Earth; he is detained and sent to Midnight Facility for interrogation. An ONI analyst sends a warning memorandum to UNSC High Command regarding growing threats of Kig-Yar pirates near key trade routes. The UNSC disregards ONI's repeated requests for official action against the Kig-Yar.Halo: Escalation, ''Halo: Escalation Issue 12|Issue #12'' The CYPHER-class Mjolnir enters mass production by Imbrium Machine Complex.Halo 5: Guardians, ''CYPHER-class Mjolnir (Body description)'' A Composer is extracted from Installation 03 by the and taken to Ivanoff Station. The List of REQ cards/Weapon Skins|Ruptive skin for the M395B DMR, MA5D assault rifle, BR85N battle rifle, M20 SMG, and M6H magnum|M6H2 magnum is approved by the UNSC Ordnance Commission. The M820 Scorpion main battle tank is introduced. The ''Eden Rising'', transporting a UNSC research team, arrives at Installation 00 via the Forerunner Portal at Voi|portal in Voi. Soon after their arrival, the UNSC establishes a Henry Lamb Research Outpost|new outpost and activates dormant Retriever Sentinels in order to start repairing the damaged Ark.Halo Wars 2''', ''Phoenix Logs'', "Henry Lamb Research Post" The D79-TC Pelican began to replace the aging D77-TC airframes. The Alluvion Research Center is lost to the waves of the Sundark Sea on Alluvion. Veta Lopis's Ferret team is declared Missing in action and presumed dead around this year. Sources

2558 was a year in the 2550s in the 26th century. It was the year the begins SPARTAN-IV program|Spartan-IV deployments to Requiem in operations referred to as "Spartan Ops," beginning the Second Battle of Requiem in early February. The Battle of Ealen IV takes place in early March, the Ven III|Battle of Ven III takes place in early May, and the Oban|Battle of Oban takes place in mid-July. Events January 17 A simulated trial hosted by AIs Roland and Black-Box is held to allow Iona to attempt to prevent her rampancy-precipitated final dispensation. Afterwards, Iona is put into stasis while the simulation is examined by human scientists.Halo: Saint's Testimony, ''page 24'' (Google Play edition) January 21 Avu Med 'Telcam is Assassination of Avu Med 'Telcam|assassinated by SPARTAN-G059 on New Llanelli.Halo: Tales from Slipspace, ''Knight Takes Bishop'' February 17 Gek 'Lhar escapes the ONI detainment center Midnight Facility, resulting in several fatalities and a heightened threat condition at the facility. February 2 The Charity Fun Run from the ship's stem to her stern takes place.Halo 4 Limited Edition ''Infinity Briefing Packet'' February 6 SPARTAN-IV program|Spartan Gabriel Thorne is assigned to Fireteam Majestic. UNSC ''Infinity'' leaves Earth orbit for her Requiem Campaign|second tour at Requiem with the intent to establish research facilities on the shield world. February 7 UNSC ''Infinity'' arrives at Requiem. Commander Sarah Palmer, leader of ''Infinitys Spartan Operations|Spartan contingent, sends various Spartan fireteams to its interior surface. Marine, Army, and Navy assets are also deployed.Spartan Ops, ''S1/Departure|S1E1 - Departure'' At 0500 hours, Operation: LAND GRAB begins, involving Fireteam Castle|Castle, Fireteam Domino|Domino, Fireteam Ivy|Ivy, Fireteam Crimson|Crimson, and Fireteam Majestic|Majestic. Fireteam Crimson is then deployed to help Marines destroy power cores, intended for short-range wireless distribution. This is done to stop Jul 'Mdama's Covenant from occuping building bases in the area. Crimson is ultimately successful. Majestic, likewise, is deployed to assist Marines in the initial assault on 'Mdama's Covenant forces in location REQ-931 with the intent of securing a location for a research base.Halo 4 Limited Edition, ''Mission Briefing'' (variable between owners) February 8 Operation: ALL-SEEING EYE: Fireteam Majestic is deployed for a reconnaissance mission to identify a possible location for base establishment as well as to gather data on any of 'Mdama's Covenant forces present. At 1901 hours, War Games simulations aboard ''Infinity'' between numerous Spartan-IV fireteams conclude for the day. February 9 Operation: CHATTERBOX: Fireteams Majestic and Crimson are deployed to locations Fortress (location)|REQ-814-B and location REQ-814-D|REQ-814-D to remove 'Mdama's Covenant forces in order to allow the UNSC to establish a base at REQ-626-C. Majestic begins by destroying one of their communications arrays at REQ-814-D. A monthly poker night takes place aboard ''Infinity'', with the grand prize of priority seating on all of the ship's internal shuttlecraft and trams. February 10 Operation: ACADEMIC: Commander Sarah Palmer directs Fireteams Majestic and Crimson to Requiem with instructions to assault one of 'Mdama's Covenant outposts and recover Requiem slipspace artifacts|a Forerunner artifact. They are successful and the artifact is taken aboard ''Infinity''.Spartan Ops, S1/Artifact|S1E2 - ''Artifact'' The device teleports Henry Glassman|Chief Engineer Henry Glassman to the surface of Requiem while he is investigating it. February 11 Operation: THREE-CARD MONTE: Fireteam Majestic, with support from Fireteams Fireteam Tower|Tower, Fireteam Castle|Castle ,and Fireteam Domino|Domino, is tasked with a search-and-destroy mission against 'Mdama's Covenant outposts at locations REQ-822-A, REQ-822-B, REQ-822-C, and REQ-822-D. Between February 11 and February 14 The Sahara-class prowler|prowler arrives at Requiem, carrying Catherine Halsey|Dr. Catherine Halsey. Halsey is brought aboard ''Infinity'' and shown the mysterious artifact.Spartan Ops, ''S1/Catherine|S1E3 - Catherine'' The Forerunner artifact scans ''Infinitys systems and begins transmitting data to the surface of Requiem, where the data is intercepted by Jul 'Mdama. Glassman is taken captive by Jul 'Mdama's Covenant and is ordered to activate the Librarian's shrine, though he is not successful. Sangheili terrorist Parg Vol is assassinated by Fireteam Crimson.Spartan Ops, S1/Catherine/Hunting Trip|S1E3Ch5 - ''Hunting Trip'' Carlo Hoya finds a classified transmission meant for Halsey and gives it to Thorne. February 14 ''Infinity's'' Atrium Park Valentine's Dance is scheduled to begin at 2015 hours. In or after February 14 Fireteam Crimson secure another Forerunner artifact, dubbed "the Didact's Gift". This device contains the memories of victims of the Ur-Didact|Didact's New Phoenix Incident|attack on New Phoenix six months prior. The processed human minds are to be repurposed as Promethean Knights. Spartan Gabriel Thorne is translocated to the Cauldron by the first artifact.Spartan Ops, ''S1/Memento Mori|S1E4 - Memento Mori'' Dr. Halsey begins dialog with an unknown party who shares her interest in the Librarian. The intelligence is actually Jul 'Mdama, the Supreme Commander, who is manipulating Halsey into divulging vital secrets about the Forerunners. Halsey is apprehended after her unwitting communication with 'Mdama is discovered. Spartan Thorne rescues Dr. Glassman and the pair escape custody, with Gek 'Lhar tracking them down.Spartan Ops, ''S1/Scattered|S1E6 - Scattered'' Dr. Halsey learns that John-117 is still alive. ''Infinity'' is boarded by 'Mdama's Covenant and Promethean forcesSpartan Ops, ''S1/Invasion|S1E7 - Invasion'' who capture the doctor. They take her to the Librarian's Rest|Librarian's "shrine", where 'Mdama awaits.Spartan Ops, ''S1/Expendable|S1E8 - Expendable'' Gek 'Lhar catches up to Thorne and Glassman, and is killed when Fireteam Majestic arrive. Admiral Serin Osman, head of the Office of Naval Intelligence, orders Captain Thomas Lasky to kill Dr. Halsey. Commander Palmer is to execute the order.Spartan Ops, ''S1/Key|S1E9 - Key'' Lasky sends Fireteam Majestic to rescue Dr. Halsey and stop Palmer. The Librarian gives Dr. Halsey the Janus Key, but Jul 'Mdama gets half of the key. Halsey gives Gabriel Thorne the other half before she is taken away. Fireteam Crimson unknowingly helps send the Librarian to the Absolute Record. Jul 'Mdama sends Requiem on a collision course with its sun, Epoloch. Fireteam Crimson, as well as Fireteam Majestic and Commander Palmer, head to shut down two respective artifacts on Requiem that hold ''Infinity'' in place and are successful. While the shield world is destroyed, UNSC ''Infinity'' narrowly escapes the planet's slipspace conduit.Spartan Ops, ''S1/Exodus|S1E10 - Exodus'' Dr. Halsey agrees to cooperate with Jul 'Mdama and his forces, stating that she wants revenge. February 18 A "Saturday Night (Cage) Fight" is scheduled to take place aboard ''Infinity'', with the Spartans of Fireteam Sydney participating. February 21 ''Infinity'' Day, marking the one-year anniversary of the flagship's commissioning ceremony. Festivities aboard the ship are to include a speech from Captain Lasky and ''Infinity''-themed cupcakes. February 25 A chili cook-off organized by Jonathan Lowell|Master Chef Jonathan Lowell is scheduled to be held in ''Infinitys forward mess hall. March 3 Captain Lasky and Commander Palmer are debriefed by the UNSC Security Council at HIGHCOM Facility Bravo-6. The committee expresses misgivings of Lasky's handling of the Requiem Campaign and the failed assassination and escape of Dr. Halsey. Terrence Hood|Fleet Admiral Hood later tasks ''Infinity'' to escort him and the Arbiter on a diplomatic mission to Ealen IV.Halo: Escalation, ''Halo: Escalation Issue 1|Issue #1'' Three ONI prowlers tasked to monitor the Swords of Sanghelios carrier ''Shadow of Intent'' are destroyed. These losses are not reported to the UNSC Navy. A Catalog unit receives a request of take control of the Forerunner ecumene made by an unknown entity bearing the Didact's sigil. March 5 Battle of Ealen IV: ''Infinity'' arrives at Ealen IV. Lord Hood meets with Thel 'Vadam and the Jiralhanae Chieftain Lydus. While negotiating, the delegates come under attack from Vata 'Gajat's mercenary group|Covenant mercenaries working for a group of human insurgents, the New Colonial Alliance. The Spartan-IVs defend the ambassadors, who escape into a nearby parts depot. Shipmaster Vata 'Gajat arrives on Ealen IV to personally oversee the attack, while the ambassadors escape through a series of tunnels leading to a fortified redoubt in which they could take refuge in. Captain Lasky orders Commander Palmer and the protection detail to escort the delegation to the redoubt, while he and Spartan Naiya Ray try to reestablish communications with the fleet above the planet.Halo: Escalation, ''Halo: Escalation Issue 2|Issue #2'' As Fireteam Jackknife arrive at the redoubt, Vladimir Scruggs betrays his team, killing them and the alien delegates' bodyguards. He then informs Commander Palmer that it is safe to bring the delegates into the redoubt. In orbit, the Sangheili and Jiralhanae ships begin to deploy forces against each other due to the ambiguity of the situation on the ground. Lasky and Ray destroy the reactor generating the Covenant jamming signal, restoring communications.Halo: Escalation, ''Halo: Escalation Issue 3|Issue #3'' After the ambassadors and their security detail arrive in the redoubt, Scruggs ambushes them and holds Hood at gunpoint. Palmer shoots Hood in the leg and, in the resulting confusion, confronts and kills Scruggs. With the mercenaries bearing on the site in force, the ambassadors escape to ''Infinity'' aboard a Covenant cargo tug. Paul DeMarco sacrifices himself to cover the ambassadors' escape with Cheru-pattern Tyrant|Covenant AA guns. ''Infinity'' rallies the Sangheili and Jiralhanae fleets, prompting 'Gajat's fleet to retreat. A funeral ceremony is held aboard ''Infinity'' for the Spartans who died in the battle. March 8 Lasky and Hood discuss the likelihood of a severe security breach in the UNSC's organization, surmising that Scruggs could not have been the one who leaked the location of the negotiations. Lasky and Hood discuss enlisting Petra Janecek's help in rooting out the spy who betrayed the Ealen IV delegation; flag officer is uneasy with Lasky's decision due to a conflict between Hood and Janecek.Halo: Escalation, ''Halo: Escalation Issue 4|Issue #4'' Lasky and Ray leave ''Infinity'' abroad a prowler in order to recruit Janecek. March 10 Lasky and Ray meet with Janecek in Castiglione on Escala III. Petra agrees to help Lasky uncover the UNSC spy in return for information regarding the Master Chief. March 11 ''Infinity'' is ambushed on a mission to rescue a damaged civilian freighter, ''Pilgrims' Pride''. However, they come under attack by automated craft supposedly originating from the long-lost . Petra Janecek, Captain Lasky and Spartan Ray travel to the Sangheili colony of Karava to uncover the identity of the UNSC Treason|traitor. Meeting Janecek's informant Zef 'Trahl, they learn that the traitor is Daniel Clayton, a former UNSC captain and the illegitimate son of ''Spirit of Fires commanding officer (and Hood's mentor), James Cutter|Captain James Cutter. The UNSC supposedly discover the whereabouts of ''Spirit of Fire'' using data from ''Pilgrims' Pride''. ''Infinity'' sets out to rescue the older ship. Upon arrival at the ''Spirit's'' supposed coordinates near Oth Lodon, however, they find a Oth Lodon station|Covenant battlestation manned by the New Colonial Alliance. Having lured ''Infinity'' into a trap, Captain Daniel Clayton fires on the UNSC vessel with the station's energy projector, killing executive officer Bradley|Commander Bradley and paralyzing Fleet Admiral Hood.Halo: Escalation, ''Halo: Escalation Issue 5|Issue #5'' Clayton orders 'Gajat to stop the Spartans who are en route to the station, but 'Gajat decides to destroy ''Infinity'' instead. Fireteam Majestic and Commander Palmer board and secure the station, then destroy 'Gajat's Ceudar-pattern heavy corvette|corvette with the energy projector. Clayton is apprehended and transported to ''Infinity''.Halo: Escalation, ''Halo: Escalation Issue 6|Issue #6'' March 14 The UNSC dispatch a trio of vessels to Oth Lodon to assist with repairs to ''Infinity'' and to monitor the captured space station. Lasky and Ray return to ''Infinity''. The captain insists that the recent ambush could have been avoided if he were present, though Palmer insists that Lord Hood is to blame. Hood visits Clayton and asks him why Admiral Mattius Drake wanted to destroy ''Infinity'' despite his attempt to Raid on UNSC Infinity|capture it 2553#January|five years prior. Clayton tells Hood the New Colonial Alliance is stronger than before and have agents on every colony, as well as Earth. Hood orders Clayton's incarceration at ONI's Midnight Facility, but Clayton insists that they will meet again and the UNSC will fall. March 15 ONI is unable to find the trail of Atriox and the Banished, who have disappeared some time before.Halo Wars 2, ''Phoenix Logs Rise of Atriox VI'' March 22 After having a nightmare about the New Phoenix Incident, Gabriel Thorne discusses it with Tedra Grant. Grant suggest Thorne the possibility of returning to New Phoenix for its reopening to see if his nightmares stop appearing after a visit to the city. After Grant's insistence, Thorne accepts.Halo: Escalation, ''Halo: Escalation Issue 7|Issue #7'' March 24 Eight months after the attack on New Phoenix, the city is lifted from its quarantine. The President of the Unified Earth Government|President of the UEG, Dr. Ruth Charet, presides over the reopening of the city. Returning to New Phoenix, Spartan Thorne, accompanied by Grant, receives proper closure about Thorne family|his grandmother's death in the New Phoenix Incident. Around March 29 The is commissioned. War photographer and journalist Benjamin Giraud is hired by ONI's Senior Communications Director Michael Sullivan to write an in-depth profile on the Master Chief. After a time, Giraud starts to sense something is off and began finding hints of cover-ups, then resolves to establish the truth and perhaps discredit the dark rumors associated with John-117.Hunt the Truth Human-Sangheili peace talks on Biko are Raid on Biko peace talks|violently disrupted by Sapien Sunrise, a reactionary anti-alien movement. John-117 arrives to stop the terrorists, killing 19 bodyguards, nine of whom are confirmed Sapien Sunrise members. The Spartan escorts Outer Colonies ambassador Richard Sekibo and all but three of the alien diplomats off-world, though Sekibo soon dies from his injuries. The event is covered up by the UEG to make the Master Chief seem responsible for the attack. However, the Spartan is soon vindicated. A signal is discovered by ONI after Dr. Catherine Halsey assisted them get into her archive. This later turns to ONI discovering the Guardian sigil.Hunt the Signal Unknown date Benjamin Giraud's findings regarding the Master Chief's past are publicly discredited by ONI and Giraud is imprisoned in Midnight Facility.Hunt the Truth, ''Season 2 Episode 1: CUBE B-349'' April 2 Xenoarchaeology|Archaeologist Nathaniel Palmer expresses optimism in his personal diary regarding the future of his team's research on Installation 00. April 15-April 17 Roughly a month after the events at Oth Lodon, ''Infinity'' is fully repaired. Around this month, the Keepers of the One Freedom enter into a temporary alliance with the Banished.''Halo: Shadows of Reach'', Chapter 3 May 8 A UNSC spy drone investigates a former Covenant bioweapon research laboratory on Ven III.Halo: Escalation, ''Halo: Escalation Issue 11|Issue #11'' May 9-May 10 Spartans Ray and Thorne are assigned to a secret mission to capture Ayit 'Sevi (whose identity is withheld from them), a Sangheili in possession of the bioweapon unleashed on Ven III. Thorne is captured and Ray discovers a major hideout for Kig-Yar pirates. Consequently, Captain Lasky decides to intervene and has ''Infinity'' head for Ven III.Halo: Escalation, ''Halo: Escalation Issue 11|Issue #12'' Arriving at Ven III, ''Infinity'' is met by the Kig-Yar pirate queen's fleet and an Space warfare|orbital engagement ensues. One of ''Infinitys Longsword fighters destroys the pirate hideout with two HAVOK missiles. Ray pursues the Sangheili agent and disables his Ghost outside the base. Before she can take any further action, a prowler lands nearby and ONI agents lead 'Sevi inside under Admiral Osman's orders. Thorne is rescued by Fireteam Majestic and Palmer, and returns to ''Infinity''. Unknown date Lasky and Palmer speculate that ONI intentionally had ''Infinity'' get involved in the mission so the Kig-Yar pirates would be eliminated, after HIGHCOM failed to get involved six months ago. They conclude that the incident with the bioweapon was set up by ONI and the Sangheili agent was working for them. July Tensions between Sangheili and human colonists on Carrow erupt into open hostility. July 15 Dr. Catherine Halsey makes a personal journal entry on her views on the Forerunners and their technology, her contribution to humanity's survival and subsequent condemnation by the UNSC, as well as her encounter with the Librarian on Requiem. Despite the UNSC turning against her, she remains determined to combine the halves of the Janus Key and take them to the Absolute Record to fulfill the Librarian's plan.Halo: Escalation, ''Halo: Escalation Issue 13|Issue #13'' July 16 Oban is Battle of Oban|attacked by Jul 'Mdama's Covenant and his Promethean allies. Spartans and UNSC Marines successfully defeat 'Mdama's forces in Saviron. July 17 Captain Lasky and Commander Palmer discuss 'Mdama's assault on Oban. Lasky points out Palmer's frustration to find Dr. Halsey and reveals he wants Halsey back in custody. Palmer objects to having Halsey brought back and expresses her to desire to eliminate Halsey instead. July 18 Dr. Halsey and Jul 'Mdama use a Requiem communication artifact|Forerunner artifact to trap ''Infinity'' in an uncharted system, preventing the ship from making slipspace jumps. Halsey intends to force the UNSC to give her their half of the Janus Key by luring them on a local planet using an energy source emanating from the surface. Aboard ''Infinity'', Commander Palmer decides to lead a Spartan team to investigate the source of the signal on the planet. July 19 The crew of UNSC ''Infinity'' track the source of interference to an island on Aktis IV. Commander Palmer and Fireteam Majestic eliminate a small group of 'Mdama's Covenant forces protecting a Forerunner structure on the island.Halo: Escalation, ''Halo: Escalation Issue 14|Issue #14'' Upon discovering an artifact within the structure that is seemingly compatible with the Janus Key, the UNSC half of the Key is brought down to the island. Having created the artifact to fool the UNSC at the suggestion of Halsey, Jul 'Mdama's forces prepare to ambush the UNSC aircraft carrying the Janus Key to take it for themselves. Sali 'Nyon's Covenant|A rogue splinter group of 'Mdama's Covenant shoots down the UNSC aircraft and takes the Janus Key half for themselves, with its leader, Sali 'Nyon, inciting a rebellion among 'Mdama's forces. Jul 'Mdama's concealed fleet emerges from Aktis IV's foam ocean and Battle of Aktis IV|engages ''Infinity'' and the UNSC ground forces. The Spartans and Dr. Glassman barricade themselves in the Forerunner structure. July 20 After seven hours of conflict, ''Infinity'' remains engaged by 'Mdama's fleet over Aktis IV.Halo: Escalation, ''Halo: Escalation Issue 15|Issue #15'' The Spartans and Dr. Glassman use the local teleportation grid to escape the besieged Forerunner structure. Palmer, Ray, and Thorne take a portal to the jungle, intending to locate Halsey, while Grant leads the rest of Fireteam Majestic and Dr. Glassman to the other end of the island where UNSC reinforcements have been deployed. With Sali 'Nyon's rebellion ongoing in 'Mdama's Covenant ranks, one Sangheili of 'Nyon's faction becomes disillusioned with the rebellion, steals 'Nyon's half of the Janus Key, and offers it to 'Mdama's forces. Dr. Halsey personally travels to the planet to claim the Key. Commander Palmer's team observe the Sangheili defector in the jungle and wait for Dr. Halsey to arrive in order to ambush her. A firefight subsequently ensues between the Spartans and Halsey's Sangheili escort.Halo: Escalation, ''Halo: Escalation Issue 16|Issue #16'' Sali 'Nyon's rebellion is stopped by Jul 'Mdama and his forces, with 'Nyon captured and all his followers killed. Palmer captures Dr. Halsey, but the doctor clouds Palmer's judgment momentarily and escapes. Palmer gives chase, only to be incapacitated by a . Halsey contacts Jul 'Mdama and is picked up by a Phantom. July 23 Aboard ''Infinity'', Lasky converses with Palmer concerning the events on Aktis IV while two ONI agents demand an audience with her. Palmer informs Lasky that because of her failure, Halsey and 'Mdama are now in possession of both halves of the Janus Key. Jul 'Mdama and Dr. Halsey recombine the halves of the Janus Key, pinpoint the location of the Absolute Record, and set course there. July The UNSC ''Infinity'' undergoes a full retrofit above Earth while undergoing repairs following the events at Aktis IV. Several modules constructed for its developing sister ship, the among other resources are redirected to supplant the ''Infinity'' and her subsystems. The ''Infinity'' returns to service after a month in drydock.''Halo: Warfleet'', p. 42-43 August 11 A shipment of a Warthog, three Mongooses, and five Pelicans is received on Meridian from a dealer nicknamed Bozo.Halo 5: Guardians, campaign level, ''Glassed'' - Mission Intel September 1 Fireteam Apollo is ordered to report to ''Infinity'' by this date. Melody Azikiwe revives Gray Team from cryo, Thars 'Sarov fights Rojka 'Kasaan above the planet Carrow, and Hekabe begins his attack on Suraka. September 15 Admiral Serin Osman briefs ONI officers about Operation: ATHENA. A five-member team consisting of Spartan Palmer, Spartan Thorne, Spartan Tanaka, Ayit 'Sevi, and Dr. Glassman is assembled to infiltrate Jul 'Mdama's fleet and relay the location of the Absolute Record for UNSC reinforcements.Halo: Escalation, ''Halo: Escalation Issue 19|Issue #19'' September 17 The team stows away aboard 'Mdama's Covenant assault carrier ''Breath of Annihilation'' just before the fleet makes the jump toward the Absolute Record. Jul's fleet exits slipstream space near a gas giant. While reaching their destination, multiple slipspace portals appear and damage several ships of the fleet, including ''Breath of Annihilation''. September The UNSC ''Infinity'' receives a full systems upgrade as well as scheduled maintenance. In the process, several modules from the incomplete are used to supplant those on the ''Infinity'', leading to the replacement of several non-essential weapon systems.Halo: Warfleet, ''pages 42-43'' October 13: 0340: Ram Chalva is interrogated by KT-49683-9 about Rion and Spark's location.Halo: Point of Light, ''Chapter 33'' October 17 Around this date, the MJOLNIR Powered Assault Armor/Mark VII|Mark VII is used as the testbed for the MJOLNIR Powered Assault Armor (GEN3)|[GEN3] improvements, but it remained uncertain if manufacturers would adopt the standards and cost accounting by the Unified Earth Government.Halo: Official Spartan Field Manual ''- Page 179''Halo: Official Spartan Field Manual ''- Page 11'' A Unidentified Spartan-IV recruit|Spartan-IV is assigned to the UNSC ''Infinity'', with Spartans Gabriel Thorne and Tedra Grant being assigned to guide him.Halo: Official Spartan Field Manual ''- Pages 8 & 9'' The UNSC ''Infinity'' prepares to leave Sol system in the next 24 hours and assault Jul's Covenant in Kamchatka, Caspar system, as part of Operation: ANCHORITE. By this date, news about the attacks on Ursa IV and Oban reach the UNSC. Within 72 hours of October 17 Forerunner Guardian|anomalies similar to those on Ursa IV and Oban occurred on Queen Anne VI, Adelaide, and Conrad's Point.Halo 5: Guardians Opening Cinematic Fireteam Osiris, led by Jameson Locke, is deployed to Kamchatka to rescue Dr. Halsey after she contacts the UNSC and claims to have information regarding the Forerunner attacks. They encounter an ongoing Battle of Kamchatka|battle between a contingent of Jul 'Mdama's Covenant and Promethean forces. Fighting their way through the chaos, they not only succeed in retrieving Halsey, but kill Jul 'Mdama in the process, dealing a crippling blow to his Covenant.Halo 5: Guardians Before October 23 Followers of the Triad spread their beliefs on social media sites. ONI agent Maya Sankar is paired with the AI Black-Box and reassigned to Conrad's Point under the cover identity of "FERO" (her alter-ego as an Insurrectionist demagogue). Her mission is to infiltrate the New Colonial Alliance|NCA forces in control of the colony and investigate the nature of the anomalies.Hunt the Truth, ''Season 2 - Failed Transmission'' October 23 Blue Team is deployed on a mission to recover the ONI research vessel ''Argent Moon''. After being contacted by Cortana, John-117 decides to go to Meridian in search of her, using the ONI Winter-class prowler|prowler ''ONI Acrisius|Acrisius'', disobeying orders to return to ''Infinity''. The other members of Blue Team follow him. Blue Team is subsequently declared AWOL. October 24 Fireteam Osiris is given operation orders to apprehend Blue Team and the prowler they took, though capturing John-117 is priority. October 25 0833: Blue Team heads to Meridian Station and is recorded though several means. Fireteam Osiris is deployed to Meridian to apprehend the AWOL Blue Team. The team arrives to find residents under attack by Promethean constructs. Osiris helps defend the colony and gains the favor of Governor Sloan, who points them in Blue Team's direction. Osiris confronts Blue Team outside a buried Forerunner Guardian, but John-117 subdues Spartan Locke and Blue Team boards the construct. As the Guardian emerges, causing untold damage to the colony, Osiris backtracks to the colony's space elevator and manages to escape the catastrophe. Meanwhile, the Guardian departs via slipspace to the Forerunner world of Genesis. October 26 In the aftermath of the Meridian Guardian, five more human colony worlds experience a Guardian emergence, bringing the total to eleven. Aboard , the AI Roland deciphers the destination coordinates of the Meridian Guardian. Dr. Halsey deduces that Osiris can follow Blue Team by inputting those coordinates in a dormant Guardian, one of which can be found on Sanghelios. The Meridian Guardian arrives at Genesis. As more Guardians arrive, some inadvertently bringing along Jul 'Mdama's Covenant vessels in their wake, Blue Team is attacked by the Forerunner entity Warden Eternal, who decides Blue Team is a threat to Cortana. Blue Team defeats the Warden and makes contact with Cortana. She explains how she survived the New Phoenix Incident and has been convinced by the Warden that she is the Reclaimer, and that it is the "Created" (artificial intelligences), not humanity (the "Creators"), who are the true inheritors of the Forerunners' Mantle of Responsibility. Evelyn Collins and Cale|Doc Cale, survivors of the Guardian emergence on Meridian search Meridian Station for rations and supplies.''Halo: Fractures''. ''What Remains'' October 27 John-117 is declared KIA by the Office of Naval Intelligence. ONI Section II Press Secretary Lieutenant Penelope Boren delivers the news of his supposed death to the public; in the announcement, she notably misspeaks the Master Chief's date of death as being October 27, ''2560'' instead of 2558. Michael Sullivan|Commander Michael Sullivan later sends a message to Serin Osman|Admiral Serin Osman apologizing for the mistake. The Triad posts a series of brief videos taken from the helmet recorders of soldiers who were on Meridian at the time of the Guardian's emergence. ''Infinity'' arrives at Sanghelios, which is besieged by the remaining members of Jul 'Mdama's Covenant. Fireteam Osiris lands on the planet to make contact with Arbiter Thel 'Vadam, and rescues him from a assassination attempt by 'Mdama's forces. Coordinating with the Swords of Sanghelios, Osiris locates a Forerunner Constructor, then aids in the Swords' assault on the Sunaion, the final stronghold of 'Mdama's Covenant on Sanghelios while the Constructor reactivates the Sanghelios Guardian. Despite heavy resistance from Promethean forces and the Warden Eternal, Osiris boards the Guardian just before it enters slipspace. Meanwhile, the Arbiter's forces eradicate the remnants of 'Mdama's Covenant. As a glass storm batters a group of survivors in Meridian Station, Marquez begins to work on building a transmitter capable of getting a signal off-world. October 28 The colony of Laika III becomes yet another casualty of an emerging Forerunner Guardian. Rogue ONI agent Maya Sankar broadcasts a warning about these events to the other colonies. Realizing that ONI will try to suppress the broadcast, however, Maya allows the Insurrectionist Bostwick to kill her in order to make "FERO" a martyr and draw more attention to the warning. The plan succeeds, and ONI is unable to contain the news of the colonies' destruction. Maya's body is recovered soon after her death and used by ONI to create an AI to allow for further analysis of her experiences. Fireteam Osiris arrives at Genesis aboard the Sanghelios Guardian, fighting through confused troops of 'Mdama's broken Covenant and aggressive Prometheans alike to reach Blue Team with the help of Genesis' monitor, 031 Exuberant Witness, who opposes the Warden Eternal and Cortana's plans to subjugate the galaxy under the Mantle. Before Osiris and Blue Team can coordinate a plan, Cortana teleports Blue Team to her inner sanctum. John-117 and Blue Team fend off a series of attacks from the Warden Eternal and confront Cortana. She reveals her intention to use the Guardians to enforce the Mantle and asks John to join her. He refuses, and she imprisons Blue Team within a Cryptum while she begins her campaign to establish the Created's control of the galaxy. After Thel's victory against Jul's Covenant, a Guardian shuts down one of Sanghelios' hemispheres. Thel's forces hides on Nuusra.Halo: Bad Blood, ''Chapter 1 As the Guardians depart Genesis, Fireteam Osiris attempt to free Blue Team. Although Cortana still controls Genesis, her imminent departure causes her to disconnect from the installation, giving 031 Exuberant Witness a window to retake it. Osiris helps the monitor regain Genesis and prevent Cortana from leaving with the Cryptum. Blue Team is liberated and returns with Osiris to Sanghelios, where they and the Arbiter, Catherine Halsey|Dr. Catherine Halsey, and Sarah Palmer|Spartan Palmer plan how to stop Cortana and the Guardians. Thanks to Blue Team's and Fireteam Osiris' actions, Keeper-of-Tools manages to find Bastion's location. Cortana arrives in Earth orbit aboard a Guardian, while the other Guardians and Created begin shutting down communications and electronic infrastructure on all human colonies. As Cortana's Guardian uses an EMP weapon to disable all of Earth's infrastructure and defenses, the makes an emergency slipspace jump and goes on the run. Survivors on Meridian make contact with Cortana, who promises that "All will be dealt with in time". Installation 00's failsafe measures prevent Cortana and her allies from being able to access the installation, closing the Portal at Voi|Portal on Earth in the process.Halo Mythos, ''page 202'' After passing The Precept's test on Erebus VII, Rion Forge and 343 Guilty Spark|Spark find Bastion within the Orion complex.Halo: Point of Light, ''Chapter 38'' At the same time, Keeper arrives at the shield world, and, with Rion and Spark's help, manages to launch the ''Eden'' to another galaxy to start the Precursor's reseeding.Halo: Point of Light, ''Chapter 41'' Spark is assigned as Bastion's caretaker, leaving the ''Ace of Spades'' and making a slipspace jump with the shield world to avoid being found by Cortana or her Guardians.Halo: Point of Light, ''Chapter 42'' October 29 The UNSC ''Infinity'' arrives to Urs system to extract Blue Team, Fireteam Osiris, Dr. Halsey, and Commander Palmer from Sanghelios. Captain Lasky requests John-117, Jameson Locke, Dr. Halsey, and Sarah Palmer on ''Infinitys bridge, while Veronica Dare, by ONI's orders, requests Edward Buck to reform Alpha-Nine, including Michael Crespo. After some initial resistance, Buck agrees.Halo: Bad Blood, ''Chapter 2 is attacked by the Warden Eternal. The ship's crew broadcast a distress call which is answered by UNSC ''Infinity''.Halo: Fractures, "Rossbach's World (story)|Rossbach's World" Buck and Dare travel to Balaho to extract Kojo Agu, and discover the Unggoy of the planet have joined the Created. After their failure to rescue the UNSC embassy' survivors, the three left the planet. November 1 Dural 'Mdama reclaims leadership over the Servants of the Abiding Truth by killing Kurnik 'Nuusra.''Halo: Legacy of Onyx'', ''Epilogue'' November 4 On Myer's Moon, Rion Forge and Little Bit wait aboard the ''Ace of Spades'' for the rest of the crew. After being put to sleep by Little Bit, Rion has one last conversation with the Librarian, who reveals her plans to reseed the Precursors in another galaxy.Halo: Point of Light, ''Chapter 44'' November 5 Power is fully restored to Paxopolis and all its research sites. November 12 The Pax Institute reopens.''Halo: Legacy of Onyx'', ''Chapter 37'' November 25 The Banished Attack on Installation 00|arrive at Installation 00 aboard ''Enduring Conviction''. After killing the UNSC forces and researchers present on the Forerunner installation, they begin to collect resources and establish a presence on the Ark.Halo Wars 2, ''Phoenix Logs The Graveyard''Halo Wars 2, ''A New Enemy'' November 28 Nathaniel Palmer records his recollection surrounding the escape of fifteen people, including himself, from the attack on the Henry Lamb Research Outpost. December 7 Teranus records a log for his Jiralhanae Captain|captain, in which he express his frustration with the Sangheili aboard the ''Enduring Conviction''.Halo Wars 2, ''Phoenix Logs - A Small Sacrifice'' Sources

2559 was a year in the 2550s in the 26th century. It was a time period filled with many large battles: the ongoing violent Sangheili-Jiralhanae war, an isolated Battle of Installation 00 (2559)|skirmish on Installation 00 between the UNSC Spirit of Fire and the Banished, and the overarching Created conflict. Events January 16 The survivors that Attack on Installation 00|fled the Henry Lamb Research Outpost|Henry Lamb Research Center on Installation 00 stumble upon a transport route set up by the Banished to move mined resources. The group rests and argues for a while concerning which direction they should head in next. January 17 Nathaniel Palmer records that including himself, only eight survivors in their group remain.''Halo Wars 2'', ''Phoenix Logs The Turn of the Screw'' January 23 Aboard the , Spartan-IV|Spartan 92738-61842-LC of Fireteam Apollo interviews Spartan Operations|Spartan Commander Sarah Palmer as part of their investigation concerning the root cause of the Created Conflict|recent decisions made by the artificial intelligence Cortana.''Halo Legendary Crate'', ''Halo Legendary Crate/Data Drops|Data Drop #11'' January 24 Spartan-IV|Spartan 92738-61842-LC continues their investigation regarding Cortana with an interview of Doctor Catherine Halsey, her Cognitive Impression Modeling|creator.''Halo Legendary Crate'', ''Halo Legendary Crate/Data Drops|Data Drop #12'' February 10 The MJOLNIR Powered Assault Armor (GEN3) enters into service.Halo Infinite, ''Discover Hope'Halo Infinite'', Step Inside March 4 Orda Val 'Saham records his thoughts on one of the Ark's Cartographers and its link to the Covenant faith.Halo Wars 2, ''Phoenix Logs The Blinded'' March 28 After 28 years of drifting in space the finds its way to the orbit of the Forerunner Installation 00, known as the Ark. Awakened from cryo-sleep, the crew eventually travels down to the Ark to find out how to establish contact with the galaxy. However, on the surface of the Ark they encounter a hostile, violent mercenary faction known as the Banished, led by the cunning Jiralhanae warlord Atriox.Halo Wars 2, campaign level ''The Signal''Halo Wars 2, ''Phoenix Logs Alice-130 Report #1'' March 29 Seth, an A.I. aboard the ''Spirit of Fire'', cross-analyzes transcripts, incident report data, and a past surveillance report provided by the Logistics Smart A.I. Isabel in order to compile a research report on Atriox for Captain James Cutter.Halo: Rise of Atriox, ''Halo: Rise of Atriox Issue 1|Issue 1''Halo: Rise of Atriox, ''Halo: Rise of Atriox Issue 4|Issue 4'' Ellen Anders learns more about the Forerunners thanks to Isabel, and wonders about the Librarian's plan for humanity, but she focuses her attention on helping the crew against the Banished.Halo Wars 2, ''Phoenix Logs The Telegony''Halo Wars 2, ''Phoenix Logs Chrysalis'' On or before March 30 The ''Spirit of Fire'' forces make an assault on the Ark's Cartographer, and learn about the Banished use of the Ark's translocation portal network. March 30 Two Unggoy attempt to desert the Banished, but they are executed by Balkarus.Halo Wars 2, ''Phoenix Logs A Warning'' Orda Val'Saham records his thoughts on the UNSC's capture of the Cartographer in his personal journal. On or before April 2 Decimus is killed by UNSC forces. Immediately after his death, the ''Spirit of Fire'' is attacked by the ''Enduring Conviction''. ''Enduring Conviction'' is destroyed by Jerome-092 and Isabel when they forced the Ark's Aggressor Sentinels into attacking the ship. A Installation 09|Halo ring is discovered on the Ark's Foundry (location)|Foundry. Ellen Anders and Installation 09 leave Installation 00 in hopes of getting to the Soell system, but are intercepted by a Guardian before they arrive. April 2 James Cutter records his thoughts on the departure of Installation 09 in his personal journal. Mays first mission, Gatecrashers, sets the expansion as taking place a month following the ''Halo Wars 2'' main game. As such, this could place the expansion anywhere between early May and early June of 2559 - the latter being the point at which the successive expansion ''Halo Wars 2: Awakening the Nightmare|Awakening the Nightmare'' is set.}} Operation: SPEARBREAKER - Sunray 1-1 manage to halt the Banished plan of using a Forerunner to destroy the ''Spirit of Fire''.Halo Wars 2, ''Operation: SPEARBREAKER: Gatecrashers''Halo Wars 2, ''Operation: SPEARBREAKER: Not on My Watch'' June 1 Comms officer G. Peterson records what he observes of the area surrounding the wreckage of ''High Charity'' on Installation 00.''Halo Wars 2'', ''Phoenix Logs Pandora's Box I'' June 4 Lieutenant Voridus of the Banished inadvertently releases the Flood from within the containment shield around ''High Charity''.''Halo Wars 2'': ''Halo Wars 2: Awakening the Nightmare|Awakening the Nightmare'', ''What Could Go Wrong?'' Voridus and his brother Pavium manage to reactivate the Sentinels, kill the Proto-Gravemind, and drive the Flood back into containment within the former Covenant city. September 19 Doctor Catherine Halsey modifies John-117's MJOLNIR Powered Assault Armor (GEN3)|third-generation Mjolnir armor. October 7 Blue Team is sent to Operation: WOLFE|recover top-secret assets from the ruins of CASTLE base on Reach.''Halo: Shadows of Reach'' October 12 The Banished opened the portal from Reach to Installation 00|the Ark, allowing Atriox to return to the galaxy. Castor led his detachment of the Keepers of the One Freedom in hijacking Pegoras|Atriox's lich to reach the Ark. The Covenant, UNSC, and Banished fought a three-way battle for control of the portal.''Halo: Divine Wind'' October 14 Ferrets, along with the UNSC Spirit of Fire and the Banished's Clan of the Long Shields, destroys Intrepid Eye and Castor's remaining Keepers of the One Freedom|Keepers on Battle of Epsilon Clarion|Epsilon Clarion to prevent Castor and the Covenant Loyalists from triggering Halo's firing mechanism. Cortana uses multiple Guardians to destroy the Jiralhanae homeworld of Doisac in an attempt to force Atriox into submission. December 11 Dr. Halsey briefs John-117 on the Weapon's mission to contain Cortana prior to the arrival at Installation 07; Thomas Lasky assigns Blue Team to an unspecified operation and Jameson Locke for Operation: BREAKER TRIP. December 12 The Battle for Zeta Halo|arrives at Installation 07, but is suddenly Battle over Installation 07|ambushed by at least 4 Banished dreadnoughts and artillery. Atriox defeats John-117 in one of the Infinity's hangars. December 13 Cortana destroys a fragment of Installation 07 and herself to deny Atriox and his Banished forces control of the Ring, unintentionally aiding fireteams Fireteam Taurus|Taurus and Fireteam Intrepid|Intrepid on their mission. December 15 Spartan Vedrana Makovich|Makovich assists the UNSC in building a foothold on the ring within the remnants of ''UNSC Mortal Reverie''. December 18 Spartan Hudson Griffin|Griffin briefs the UNSC survivors of the Banished occupation of Installation 07. December 26 Spartan Tomas Horvath|Horvath eavesdrop on Banished Jiralhanae arguing over a potential key choke point. December 28 Spartan Theodore Sorel|Sorel and a squad of Marines discover that Installation 07 is slowly reparing itself. A Unidentified Sangheili Shipmaster (The Return)|Sangheili shipmaster returns to the glassed human colony of Kholo.Halo: Evolutions - Essential Tales of the Halo Universe, "The Return", ''page 492'' The species wide Sangheili-Jiralhanae war|war between the Sangheili and the Jiralhanae is still ongoing.Halo: Evolutions - Essential Tales of the Halo Universe''' "The Return" - '' "It was a terrible war. The Prophets provided the Brutes with powerful new weapons, hoping that they would in turn defend their Prophets against our wrath. But when the Prophets went into hiding, the lack of leadership allowed the Brutes to return to their savage nature and they soon began to fight against each other. This lack of solidarity made them much easier prey. Some of my fellow commanders continue that fight even now"'' Yapyap rebels against the Banished. Notes Sources

2560 was a year in the 2560s in the 26th century. Events January 8 Spartan Tomas Horvath|Horvath attempt to destroy one of the Kywasky Workshop Gorespike cannons, but encounters a banter between 2 Banished Sangheili. January 20 Spartans Hudson Griffin|Griffin and Nina Kovan|Kovan learn that the Banished will turn to infighting and make a plan to assassinate War Chief Escharum. January 23 Fireteam Taurus asks Spartan Bertold Vettel|Vettel to stay behind at the remnants of the ''UNSC Mortal Reverie'' as they begin preparations for Escharum's assassination. January 30 The assassination attempt on Escharum backfires and he orders Tremonius and his Banished forces to assault the ''Mortal Reverie''. Spartan Griffin sends an SOS to the squad and warns of an invading Banished force. January 31 Spartan Bonita Stone|Stone learns that the Banished are gathering a massive invasion force at Riven Gate, heading for the ''Mortal Reverie''. Spartans Vedrana Makovich|Makovich and Vettel prepare the UNSC remnants to defend the ''Mortal Reverie''. February 2 The ''Mortal Reverie'' fall to the Banished forces led by Tremonius. Outpost Tremonius (location)|Outpost Tremonius is named after this Banished victory by Escharum's recommendation. March 3 The surviving Spartans from the ''Mortal Reverie'' enact the Rubicon Protocol, a contigency plan to halt the advancing Banished forces on Installation 07 by any means necessary. Before April 23 Escharum forces combat medic Lucas Browning to open the Cylix unearthed by Tremonius containing The Harbinger before being transported to Chak 'Lok's Tower and eventually the Harbinger's chamber. April 23 Spartan Stone learns that the Banished are transporting Forerunner technology to a site called the Conservatory (location)|Conservatory from scouting Outpost Tremonius. April 24 Spartans Makovich and Theodore Sorel|Sorel learn that Escharum and the Harbinger are planning on capturing 117649 Despondent Pyre, monitor of Installation 07. April 26 Spartan Stone discovers the Weapon's signal underneath the surface of Installation 07 before being ambushed and killed by Jega 'Rdomnai. April 29 Spartan Vettel learns that Spartan Griffin is locked away inside Chak 'Lok's Tower and attempts a daring rescue, but fails. May 15 Spartans Makovich and Sorel enter the Conservatory and follow the Banished inside, but are ambushed and killed by the Hand of Atriox, composed of Jega 'Rdomnai, Hyperius, and Tovarus. May 26 Spartan Horvath sends a final transmission to the UNSC survivors, pleading for John-117 to return and turn the tide against the Banished. May 28 John-117 is recovered from the remnants of the battle between the ''UNSC Infinity'' and the Banished by Echo 216 and its Fernando Esparza|pilot. Escharum discovers that John-117 has returned thanks to the latter's participation in the destruction of the ''Ghost of Gbraakon''. John-117 recovers the Weapon underneath the surface of Installation 07 and defeats Tremonius. John-117 rescues the captured Marines, takes down various high-value targets, assists the survivors in capturing various Forward Operating Bases or FOBs, and shuts down various Banished facilities. John-117 defeats Chak 'Lok inside his Tower and learns of a Banished mining operation into the Conservatory thanks to Spartan Griffin, who dies of his torture. The Weapon helps John-117 defeat Bassus at the Excavation Site and shut down the drill preventing entry into the Conservatory. The Weapon learns of a mysterious entity worse than the Flood recovered from a past exchange between Cortana and 117649 Despondent Pyre prior to the arrival of the ''UNSC Infinity''. John-117 meets the Harbinger, whose plans are to free the Xalanyn|Endless from the Cylixes. John-117 and the Weapon learn that the Harbinger and the Banished are planning to repair Installation 07 through Forerunner Spires. Echo 216 gets shot down by 3 Banished AA cannons en route to the Command Spire. John-117 disables the AA cannons and defeat Hyperius and Tovarus. The Harbinger springs a trap on the Weapon while extracting the data needed to enter the Command Spire. While exploring the Command Spire, more of Cortana's past actions are revealed, including her role in the destruction of Laconia Station at the hands of the AI Leonidas. John-117 shuts downs all of the Spires, but the Pilot is captured by Jega 'Rdomnai. En route to the Pilot's rescue, the Weapon discovers that Cortana destroyed Doisac because Atriox refused to join the Created. John-117 survives the House of Reckoning (location)|House of Reckoning, defeats the remaining Banished leaders, and rescues the Pilot. John-117 and the Weapon discover the true purpose of the Silent Auditorium (location)|Silent Auditorium, the site of Cortana's sacrifice, and defeats the Harbinger. John-117 and the Weapon escape the collapsing chamber through a translocation portal May 31 Echo 216 picks up John-117 and the Weapon as they appear in another location within Installation 07, after being missing for three days. The pilot is revealed to be Fernando Esparza, a civilian engineer. Atriox discovers the Endless in their Cylixes. October 27 John-117 was accidentally declared KIA on this date by ONI Section II Press Secretary Lieutenant Penelope Boren, who was meant to say ''"2558"'' instead of ''"2560"''. The Banished attack the blood-moon of Suban, resulting in a battle against the Swords of Sanghelios and their UNSC allies. Sources

2567 was a year in the 2560s in the 26th century. Events Sergeant Tomas Navarro retires from United Nations Space Command|UNSC service. Production notes Concept art produced for a Halo Wars 3 (rejected pitch)|hypothetical pitch for a ''Halo Wars 3'' listed the game's setting as the year 2567. Sources

2570 was a year in the 2570s in the 26th century. Events The UNSC Air Force intended to replace their aging fleet of S-14 Baselard strike fighters with S-930 Pegasus' by this year, though the program was halted due to the onset of the Created uprising. Sources

2573 was a year in the 2570s in the 26th century. Events Roland Huffman and Niraj Shah retire from United Nations Space Command|UNSC service. Sources

2578 was a year in the 2570s in the 26th century. Events June 10 The details of Spartan 92738-61842-LC's assignment to Fireteam Apollo are set to be declassified. Sources

2581 was a year in the 2580s in the 26th century. Events Pawel Czernek retires from active service with the UNSC UNSC Marine Corps|Marine Corps at the rank of Major (UNSC)|Major. Sources

2589 was a year in the 2580s in the 26th century. Events July 7 The site of SPARTAN-B312's death at Aszod on Reach has been Terraforming|reterraformed with his helmet still there. Sources

2590 was a year in the 2590s in the 26th century. Events 5 years prior to Niraj Shah visiting the site There is a ceremony for John-117 in an undisclosed location near one of the locations of the Battle for Earth. However, his coffin is empty. Sources

2595 was a year in the 2595s in the 26th century. Events 43 years after the Battle for Earth Lieutenant Niraj Shah returns to one site of the Battle for Earth 43 years after the battle for an interview, near the ceremonial grave of John-117. Sources

File:Ammo -Gauss.png|thumb|x300px|A 25x130mm slug. 25x130mm is a calibre of ammunition primarily employed by the gauss cannons used by the United Nations Space Command and Colonial Military Authority. Overview File:Gaussshot.jpg|thumb|250px|A 25x130mm projectile in mid-air, surrounded by a blue energy field. 25x130mm rounds are primarily employed by gauss cannons, which are capable of firing the projectiles at velocities of up to Mach 40. Gauss cannons capable of firing the 25x130mm include the following models; M65 Gauss cannon M68 Gauss cannon M68B Gauss cannon M70 Gauss cannon Variants File:HW2 ForgeHog Anvil.png|300px|thumb|The Anvil round's effect, after being fired by Forge's Warthog. When fired, Anvil rounds create an Electromagnetic pulse|EMP pulse at the point of impact. The rounds also deal more damage than the standard Gauss cannon munitions. Sergeant John Forge modified his own John Forge's Warthog|personal Warthog to fire these rounds. The 25x130mm armor-piercing, limited penetration/frangible (APLP/F) is employed on M68 and M68B Gauss cannons. The M485 High-Velocity/Ferric-Tungsten Hollow-Point Projectile (HV/FTHPP) is a specialised 25x130mm projectile used in M68, M68B and M70 coilguns. Gameplay In ''Halo Wars 2'', the Anvil round is available as the first upgrade for the Forge's Warthog hero unit. Forge's Warthog upgrade: Anvil Round *Info: Fires an EMP round, Slows enemy vehicles *Tier: 1 *Cost: Supplies 0, Power 325 Once unlocked, the Anvil round can be fired as the vehicle's Y ability. List of appearances ''Halo 2'' ''Halo 3'' ''Halo Wars'' ''Halo 3: ODST'' ''Halo: Evolutions - Essential Tales of the Halo Universe'' *''Palace Hotel'' ''Halo: Reach'' ''Halo 4'' *''Spartan Ops'' ''Halo 2: Anniversary'' ''Halo 5: Guardians'' ''Halo: Ground Command'' ''Halo Wars 2'' Sources

The 26 Draconis system is a planetary system that is controlled by the United Nations Space Command. History This system was the site of the Callisto Incident which arguably marked the beginning of the Insurrection. In the 2490s Insurrectionists captured the and murdered the crew. In response the United Nations Space Command|UNSC dispatched a battle group of the three destroyers, which confronted the ''Callisto'' in the 26 Draconis system on 2494|March 2, 2494. The resulting clash led to the surrender of the ''Callisto'', but at the cost of one destroyer annihilated and the two others severely damaged. It was future-Admiral Preston Cole's first combat experience.Halo: Evolutions - Essential Tales of the Halo Universe, "The Impossible Life and the Possible Death of Preston J. Cole" List of appearances ''Halo: Evolutions - Essential Tales of the Halo Universe'' *''The Impossible Life and the Possible Death of Preston J. Cole'' Sources Category:Planetary systems

2607 was a year in the 2600s in the 27th century. Events The John-117 Monument began construction to commemorate the Spartan's service to mankind. Sources

2608 was a year in the 2600s in the 27th century. Events January 1 Fireteam Osiris's Operation orders to recover the 2558#October|then AWOL Blue Team, and the ONI prowler ''ONI Acrisius|Acrisius'' become declassified. Sources

2610 was a year in the 2610s in the 27th century. Events January 15 A collection of historical artifacts from the Fall of Reach is sent from Unidentified Beta-5 Division operative|a former ONI agent from Esztergom, Reach to his cousin on Earth. These artifacts include Catherine Halsey|Dr. Catherine Halsey's Dr. Halsey's personal journal|personal journal and a 1:53 scale replica statue of Spartan NOBLE Team, based on the one erected at Hosok tere in New Alexandria (location)|New Alexandria. The collection is delivered in a 600 series ONI security container, the scale replica statue is intended for the curator of the Museum of Humanity, Bjarne|Ms. Bjarne, while the Journal was given an option to be given to Bjarne or someone at "IN". Three years after 2607 Three years after its conception, the completely hand-crafted John-117 Monument was finished and placed in the Museum of Humanity to commemorate the SPARTAN program|Spartans' timeless and selfless dedication to protect humanity. Sources

}} The 26th Marine Expeditionary Force is a United Nations Space Command|UNSC UNSC Marine Corps|Marine Corps formation, which was a part of a Rapid Offensive Picket. This unit fought during the Battle of New Jerusalem in the Cygnus system in the summer of 2552, and they suffered tremendous casualties during the battle. Several members of the unit were Orbital Drop Shock Troopers. The Rookie was the only known member of this unit, and among its few survivors. List of appearances ''Halo 3: ODST Pre-mission Evaluation'' ''Halo 3: ODST'' Sources Category:Marine expeditionary units

|gender= |height= |mass= |hair= |eyes= |affiliation=*Spartan Operations *SPARTAN-IV program |rank=Spartan Operations#Rank structure|Spartan |sn=29243-35421-CR |notable=Graduated from the Avery J. Johnson Academy of Military Science }} 29243-35421-CR is the service number of a SPARTAN-IV Program|Spartan-IV supersoldier. They graduated from the Avery J. Johnson Academy of Military Science. Biography 29243-35421-CR entered the Spartan-IV program as a recruit, where they were put through training at the Avery J. Johnson Academy of Military Science. They eventually graduated, and were put on a list of Spartans who graduated at the academy. Gallery File:HINF LiveFireEntranceway.png|A look at the board display of Spartans who graduated. List of appearances ''Halo Infinite'' Sources Category:Spartan-IVs Category:Human characters

|color=Blue illuminationsHalo: Broken Circle, ''page 93'' |affiliation= Forerunner ecumene |function=Monitor of The Refuge }} 295 Enduring Bias, known as the Flying Voice to some Sangheili, is a Forerunner monitor tasked with maintaining Shield World 0673, also known as The Refuge. Biography Enduring Bias was brought to Shield World 0673 by the Forerunners sometime after it was constructed. However, the shield world's ability to dismantle itself and remain habitable had not yet been tested. Although he once was knowledgeable about the Halo Array, the information was removed by the Forerunners for security concerns. Bias was given the duty of watching over the shield world and repair any possible damages. After the firing of the Halo Array, Bias was puzzled as to why no Forerunner had returned to retrieve him and the monitor eventually determined that he was on his own. As time passed, some of Bias' processes began to fail.Halo: Broken Circle, ''pages 68-72'' Sometime before the San'Shyuum-Sangheili War, Sangheili warrior 'Crecka came across the shield world after his ship was attacked by an unidentified species. When he entered the world, he came into contact with Enduring Bias. The monitor introduced himself and scanned through 'Creck's ship's systems to learn the Sangheili language. Then, Enduring Bias told 'Crecka that he intended to use the Sangheili for studying purposes. Confused, 'Crecka fled the world and the monitor was unable to stop him due to his failing systems.Halo: Broken Circle, ''pages 28-29'' In 851 BCE, Enduring Bias once again met with 'Crecka, who had brought Ussa 'Xellus and his mate, Sooln 'Xellus|Sooln, to the shield world. Ussa intended to use the world as a refuge for his fellow insurgents that were rebelling against the newly-formed Covenant. Bias allowed the Sangheili to stay on the world, but demanded to know their full intents. The monitor seemingly accepted Ussa's intentions, as Ussa transported the rest of his allies from Sanghelios to the shield world shortly after.Halo: Broken Circle, ''page 36'' Bias showed the Sangheili around the world and informed them of its processes and capabilities. As the Sangheili insurgents began to create settlements on the shield world, Sooln would often speak with Enduring Bias about the world.Halo: Broken Circle, ''page 49'' During one of these conversations, Bias revealed that the shield world was not entirely completed when the Forerunners disappeared. The shield world had the ability to disassemble itself and have its disparate parts still habitable, although Bias was unsure if the feature was completely reliable. He later spoke with Ussa and Sooln and showed them a holography|holographic demonstration of the shield world's capabilities. As Bias was replaying the holographic demonstration to himself, Tersa 'Gunok saw the holograms and became curious. He questioned Bias on the shield world's "Disassembler" process. Bias' vague explanation caused 'Gunok to begin to doubt Ussa's intentions, as Enduring Bias unintentionally implied that Ussa wished to test the Disassembler process himselfeven if it led to the deaths of all Sangheili in the colony.Halo: Broken Circle, ''pages 80-82'' Bias continued to unintentionally incriminate Ussa and Sooln after a conversation he had with 'Gunok, Salus 'Crolon, and 'Drem. He informed the three that Sooln had helped reprogram some of his failing processes and that he was loyal to anyone that programmed him. After he learned that the San'Shyuum had connections to the Huragok from Sooln, Bias stated that he would accept the presence of San'Shyuum on the world, as he believed that they would bring along Huragok to fully repair Bias. 'Crolon and 'Drem came to believe that Sooln and Ussa were actually conspiring with the San'Shyuum and began plotting against him.Halo: Broken Circle, ''pages 90-94'' Later, when Ussa was putting 'Drem and 'Crolon on trial, contemplating if the two were being treasonous, Enduring Bias arrived. At Ussa's request, Bias projected footage of 'Drem and 'Crolon conspiring against Ussa. 'Crolon claimed that Bias fabricated the footage. While Bias admitted that he had the capability to do so, he claimed that he did not as it was not necessary. 'Drem was then executed when he attempted to escape and 'Crolon was imprisoned to await a public execution for treason. After the situation was settled, Ussa and Bias conversed in private.Halo: Broken Circle, ''pages 144-146'' Sometime later, 'Crolon escaped from his prison cell. Ussa summoned Enduring Bias and had the monitor display a holographic surveillance video that detailed how 'Crolon escaped. Bias warned Ussa and Sooln that 'Crolon was preparing to launch a vessel from the Sangheili hangar bay. As the monitor transported the two Sangheili to the hangar inside a freighter, Sooln told Bias to close the hangar door, but the monitor revealed that 'Crolon had sabotaged the controls. The three eventually made it to the hangar, but witnessed 'Crolon escaping the shield world in ''Clan's Blade''.Halo: Broken Circle, ''pages 155-158'' When a Covenant fleet arrived in the Ussan system, Enduring Bias informed Ussa and projected a transmission from the Mken 'Scre'ah'ben|Prophet of Inner Conviction. The San'Shyuum spoke with Ussa and attempted to convince him to surrender but, ultimately, Ussa had Bias end the transmission.Halo: Broken Circle, ''pages 171-176'' Realizing that his forces would not be able to survive the imminent Covenant assault, Ussa had Bias activate the shield world's Disassembler process. The Covenant forces retreated from the world and witnessed the process. Believing the Sangheili insurgents to have been killed, they left the system. However, Enduring Bias and the Sangheili survived in freighters and eventually they resettled in the former shield world's fragmented habitats.Halo: Broken Circle, ''pages 182-183'' The Sangheili insurgentsnow referred to as the Ussansworked to rebuild on the "Refuge" and create their own Sanghelios with Bias. However, the Refuge's Primary Section was struck by a comet fragment and Bias was heavily damaged in the incident. The monitor became deactivated and showed no signs of "life". Enduring Bias' remains were placed inside a sphere of glass, known as the Homage to Enduring Bias, which was cleaned daily. Ussa later wrote that he believed that the monitor would become active at some point in the future and that it was possible that Enduring Bias was slowly repairing itself. Halo: Broken Circle, ''page 205'' Although inactive, Enduring Bias was still sometimes able to listen to the conversations of others.Halo: Broken Circle, ''page 284'' In 2553, a Sangheili-controlled vessel, ''Journey's Sustenance'', discovered the Refuge. The ship carried aboard a Huragok, Sluggish Drifter. The Refuge was now controlled by Kaidon Bal'Tol 'Xellus and a outbreak of the Blood Sickness led to a rebellion in the Refuge. When the Sangheili, the Prophet of Clarity, and the Huragok of ''Journey's Sustenance'' came aboard the Refuge, Sluggish Drifter repaired Enduring Bias. After being reactivated, Bias headed to the Combat Section of the Refuge where a floatfighting match was being held between the Ussans and the insurgent 'Greftus Faction to determine which faction would govern the Refuge. When Bias arrived, he killed V'urm 'Kerdeck before the Sangheili could kill Bal'Tol. Using gravitational technology to hold all the surviving floatfighters in place, Bias spoke with Bal'Tol. However, the leader of the rebel faction, Oska 'Meln|'Kinsa, took aim at the monitor with a mec-missile launcher. Bias deflected the crude missile in mid-air and promptly killed 'Kinsa. Enduring Bias later had the wounded receive medical attention.Halo: Broken Circle, ''pages 284-286'' Enduring Bias later went to the insurgent-controlled Section Five of the Refuge with the Prophet of Clarity and several Sangheili warriors to help eliminate the remaining rebel forces.Halo: Broken Circle, ''page 287'' While the Ussans used rocket launchers to eliminate the hostile forces, the rebels used mec-missile launchers. However, Bias would shoot each hostile missile out of the air with a pulse beam. The Ussans had Enduring Bias record the elimination of the rebels and transmit the video to every Sangheili in the colony. Eventually, Bias had the Ussans stop firing to prevent them from damaging the Refuge's technology. Instead, Enduring Bias used his pulse beam to kill all of the hostile rebels, with some surrendering to the monitor.Halo: Broken Circle, ''pages 288-290'' After helping quell the rebellion, Bias and Sluggish Drifter worked together and formed a cure for the Blood Sickness. He later helped Qerspa 'Tel create an anti-toxin that would be distributed among the Sangheili to cure all cases of the Blood Sickness disease. After, Bal'Tol had Enduring Bias join the fragmented sections of the Refuge together, forming a connected, ring-shaped structure for the Ussans to live in.Halo: Broken Circle, ''pages 291-294'' Personality and traits }} Enduring Bias was capable of incredible feats and was very intellectual, like most monitors. However, he was often very casual in conversationno matter the topic. Ussa 'Xellus believed that the monitor lacked dignity and was unable to comprehend the seriousness of certain situations. When the Forerunners removed information from Bias' memory storage, a "gap" was left in his mind, which he found problematic. For example, Bias had forgotten to mention the Flood to the Sangheili until after the Disassembler process occurred. During their time on the shield world, Enduring Bias came to bond with several of the Sangheili inhabitants, particularly Ussa 'Xellus and his mate, Sooln 'Xellus|Sooln. Sooln often engaged in long conversations with the monitor, curious to learn the information he held. She repaired some of the monitor's broken processes, causing Bias to become very loyal to Sooln and he considered her one of his programmers. Bias was saddened to find the memorials of Ussa and Sooln had been vandalized by the rebels of the 'Greftus Faction.Halo: Broken Circle, ''page 290'' Enduring Bias came to respect the Sangheili and adhered to their culture and customs. He spoke with a male voice, knowing that it would gain him more respect among the Sangheili. Similar to 343 Guilty Spark, Enduring Bias experienced loneliness on the shield world and expressed a desire for company. He admitted that having no one to talk to for numerous millennia left him over-talkative and unfocused. After he realized that he had been left alone on the shield world, Bias was confused as he was never given a clear-cut purpose. The monitor experienced an existential crisis of sorts when he met the Sangheili 'Crecka. Bias learned that the Librarian's Conservation Measure was a success and that the shield worldsand by extension, his own purpose and functionwere ultimately unnecessary. The monitor often spoke to himself in a language that was once used by the Forerunners.Halo: Broken Circle, ''page 80'' Although many Sangheili came to respect Enduring Bias and even worshipped him, some remained reluctant to trust him or feared the monitor entirely. 'Drem even called the monitor the "dark angel".Halo: Broken Circle, ''page 91'' List of appearances ''Halo: Broken Circle'' Sources Category:Forerunner A.I. Category:AI characters

|gender= |description= |color= |affiliation=Ecumene |number= |function=Caretaker of Trove |notable= }} 295 Harken Watch was an ancilla constructed by the Forerunners, and the monitor assigned as the caretaker of the Shield world|shield installation Trove. Biography 295 Harken Watch was activated sometime prior to the end of the Forerunner-Flood war, and was present on Trove when the world was attacked by Flood forces. During the conflict, the shield world's surface was overrun and the monitor damaged. In response to this, 295 Harken Watch attempted to escape to the shield world's interior, with the retreat covered by three Prometheans - Animus-To-Remain, Habit-To-Sever and Malice-Begets-Demise. All three died to cover Harken Watch's escape, allowing the monitor to successfully seal off the shield world and prevent the Flood from gaining entry. During the Human-Covenant War, Trove was obliterated in a Battle of Trove|short battle by human forces of . 295 Harken Watch was destroyed in this explosion, though fragments did survive. In 2557, a fragment of Harken Watch was recovered by the crew of the salvager ship ''Ace of Spades'' and partially-restored. The fragment, nicknamed "Little Bit", was adopted by the crew of ''Ace of Spades'' as the resident shipboard Artificial intelligence|AI. Although Little Bit was eventually taken by ONI, 343 Guilty Spark, the former Monitor of Installation 04, was able to extract a copy of the AI from some data that it had generated and more properly repair Little Bit to be the ship's AI. Spark suspected that Little Bit's strange behavior may have come from the trauma of trying desperately to escape from his dying world. Production notes During the ''Halo Wars'' level Cleansing, an Unidentified ancilla (Shield World 0459)|unidentified AI voice can be heard in the mission directing the efforts of the cleansing rings and Sentinels. It is unknown whether this voice represents the voice of 295 Harken Watch, or another sub-monitor or intelligence assigned to Trove. List of appearances ''Halo: Smoke and Shadow'' Sources Category:Forerunner A.I. Category:AI characters