2495

January

 * January: Eridanus II is claimed by the Secessionist Union.
 * The Sundered Legion is defeated on Meridian after the Siege of Athea.

February

 * February 8: Jacob Keyes is born on Earth.

December

 * 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.

Unknown

 * The UNSC takes control of the station and adds fusion reactors and a Shaw-Fujikawa Translight Engine, turning the Hopeful into the largest mobile battlefield hospital in history.
 * After only two years of service, the s, including the, are temporarily scrapped by the UNSC Navy.