2548


 * Roland Huffman and Niraj Shah join the UNSC Defense Force.


 * The M392 Designated Marksman Rifle is replaced by the BR55 in all branches but the Army.


 * The MJOLNIR Powered Assault Armor/CQC variant enters service.

June

 * June 4th: Michael "Mickey" Crespo enlists in the UNSC Marine Corps.