2510

May

 * May 28: Atriox is born.

August

 * August 8: Dr. Catherine Halsey makes the first entry in her journal following her enlistment in ONI's service and arrival on Reach.
 * August 15: Thomas Lasky is born in Tricode Village, Mare Erythraeum on Mars.
 * August 22: Edward Buck is born in New Albany, Lombard, on Draco III.

September

 * September 3: Michael Sullivan is born on Emerald Cove.

December

 * December 1: The is commissioned into service.
 * December 15: Carris-137 is born in Irbid, Tribute in the Epsilon Eridani System.

Unknown

 * Between 2510 and 2511, the future candidates for the SPARTAN-II program are born.
 * The Mark III exoskeleton is introduced. It is retired the following year, with the Office of Naval Intelligence's Materials Group pursuing Project: MJOLNIR instead.
 * The structural system of the Halcyon-class light cruiser is designed by Dr. Robert McLees.