2551

• Pawel Czernek enters 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.
• Gray Team is deployed on a mission against a Covenant facility within humanity's former territory.
• The Battle of Meridian takes place. Meridian is glassed and Chalybs Defense Solutions facilities on the moon are abandoned. The Covenant discovers a Luminary on Meridian that leads to Earth.
• The UNSC Iroquois begins construction.
• January 17: UNSC "smart" artificial intelligence Iona begins service.
• February 19: The SPARTAN-IIIs of Gamma Company begin their week-long augmentation process on the UNSC Hopeful as part of Project CHRYSANTHEMUM.
• May 8: Dr. Catherine Halsey undergoes the Hemley & Aubourn Behavior Analysis; the results make ONI increasingly wary about her reported unreliability.
• November 24: Mark V[B], the initial production model of the Mark V MJOLNIR armor, enters service.
• December 22: The Car & Pilot Magazine releases its December 2551 Edition. This includes a review of the new 2553 edition of the Civilian "Hog".