2528

January

 * January 30: James Cutter turns down a command position on board the cruiser.

February

 * February 13: The Battle of XI Boötis A takes place, resulting in a UNSC victory.

December

 * December 5: Edward Buck enlists in the UNSC Marine Corps.
 * December: Madrigal is invaded and glassed by the Covenant. Survivors flee to a set of asteroids in orbit above Hesiod, dubbing the worldlets the Rubble.

Unknown

 * Insurrectionist factions on Talitsa officially disband due to the escalation of the Human-Covenant War.
 * Construction Platform 966A is decommissioned and abandoned.
 * The Battle of Hat Yai takes place either late this year or in 2529.
 * The MJOLNIR Security variant is first produced by Misriah Armory.
 * The Assembly 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.