2551

2551 was a year in the 2550s in the 26th century.

Events

January 17

February 19

As part of Project CHRYSANTHEMUM, the SPARTAN-IIIs of Gamma Company begin their week-long augmentation process on the UNSC Hopeful in Sector K-009 folllowing its departure from Reach.^[1]^[2]

February 27

The Hopeful returns to Reach following the Spartans' augmentation procedures.^[3]

Before May, the CAS-class assault carrier Enduring Conviction, led by Let 'Volir, faces against the UNSC. During the battle, the Enduring Conviction performed impressive evasive maneuvers.^[4]

May 8

Dr. Catherine Halsey undergoes the Hemley & Aubourn Behavior Analysis; the results make ONI increasingly wary about her reported unreliability.^[5]

November 24

Mark V[B], the initial production model of the Mark V MJOLNIR armor,^[6] enters service.^[7]

December 22

Pawel Czernek and John Tippett enter active service with the UNSC Marine Corps.
Concord is attacked by the Covenant; the colony survives largely intact. The Venator MJOLNIR [GEN1] variant gains prominence in the attack.^[9]^[10]
Gray Team is deployed on a mission against a Covenant facility within humanity's former territory.^[11]
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.^[12]
The UNSC Iroquois begins construction.^[13]
Veta Lopis' mother dies.^[14]
The M11 combat knife is manufactured by the Watershed Division.^[15]