2552
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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 major assaults on the human Inner Colonies and an invasion followed by a prolonged engagement on their home planet, Earth.[1][2][3] During the battle at Installation 04, the galaxy found its first large outbreak of the Flood threat in over a hundred thousand years.[4][5] Over one month later, an even larger outbreak occurred at Installation 05.[6]
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.[7][8] The alliance was successful in their mission against the Covenant and ended the 27 year long war.
Events[edit]
Before June[edit]
- 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 another system.
January[edit]
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.[9]
February[edit]
February
- Insurrectionists on Harmony disable the planet's primary communications relay and steal two drydocked freighters.[10]
March[edit]
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.[11]
April[edit]
April 22
- Battle of Fumirole: Noble Team member Thom-A293 destroys a Ket-pattern battlecruiser but kills himself in the process, and Catherine-B320 loses her arm. She subsequently receives a robotic prosthetic.[12]
Unknown Date
- The UNSC Iroquois finishes construction.[13]
May[edit]
May 10
- SPARTAN-B312 takes part in a counter-insurgency operation on Mamore. The Spartan's skills as a Sabre pilot are exhibited during the op, prompting Colonel Urban Holland to have him transferred to Noble Team.[14]
May 14 through May 19
- UNSC forces in the Earth Defense Coordination Zone are placed at maximum readiness levels and all warships with magnetic accelerator cannons are self-deployed or towed to rally points. Cairo Station is established as flag headquarters.[15]
May 15
- Kalmiya informs Dr. Halsey about several documents she watched in Vice Admiral Michael Stanforth's Beta-5 server which ranges from service order transfers of existing Spartan-IIs to highly classified non-Spartan-II detachments.[16]
May 24
July[edit]
Unknown date
- The Battle of New Jerusalem takes place sometime this month or the next.[18] The 26th Marine Expeditionary Force is nearly wiped out, leaving Private First Class Jonathan Doherty as one of the few survivors.[19]
After July 5
- Gabriel Thorne single-handedly saves his entire platoon in the Battle of Criterion.[20]
July 17
- The Slipspace monitoring probes from Remote Scanning Station Archimedes at the edge of the Sigma Octanus system encounter the Covenant ships sent to attack Sigma Octanus IV.[21]
- The UNSC Iroquois is tasked with patrolling the Sigma Octanus star system.[13]
- The Battle of Sigma Octanus IV begins.[13]
July 18
- The UNSC win a victory during the battle at Sigma Octanus IV. Commander Jacob Keyes, of the UNSC Iroquois, plays a critical role in this success when he devises the Keyes Loop maneuver.[22] Keyes is subsequently promoted to Captain by Vice Admiral Michael Stanforth.[23] Unknown to the UNSC, the Covenant place a 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. [24]
- Vice Admiral Stanforth messages the director of the Office of Naval Intelligence, Admiral Margaret Parangosky, with information on the battle at Sigma Octanus IV, as well as the ongoing progress of Operation: BRAVADO.[25]
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 invasion of the planet.[26]
- Noble Team finds and stops a pair of Insurrectionist SCI combatants attempting to hijack a supply transport.[10]
- Fireteam 3 Charlie,