2491

2491 was a year in the 2490s in the 25th century.

January
January January 29 After January 29
 * 48452-556-EPN644, a member of the Assembly, submits himself for vivisection by the humans, with the intent of sparking an interest in the long-dormant Orion Project.
 * The Orion program is re-initiated.
 * Gladys Wilson volunteered for the ORION program after a year an a half of special forces, where her superior Aaron Lewis only accepted the transfer to get rid of her.

April
April 2
 * The planet Onyx is discovered and first investigated in this year.

May
May 6
 * A report is made on Onyx, the planet being recommended for colonization.

July
July 8
 * The Jiralhanae Tartarus is born on Doisac.

Unknown

 * Elias Carver publishes a set of theories known as the Carver Findings.
 * The Assembly decides to have Onyx removed from the list of potential planets for colonization, due to the advanced alien technology present on the planet.
 * The M99 Stanchion presumably enters production for service within the UNSC.
 * The position of captain of the Spirit of Fire is transferred from Captain Rehkov to Captain Donald.

Circa 2491
Between October 25 2490 to October 23 2492
 * Rear Admiral Ned Rich is born.