2500

2500 was a year in the 2500s in the 25th century. The year 2500 took place during the Covenant's 23rd Age of Doubt. It saw a major change in the UNSC's tactics used against the Insurrection, as Operation: KALEIDOSCOPE was launched this year.

March
March 9
 * Preston Cole sends a communiqué to his wife, Inna Volkov, urging her to reconsider her recent filing for divorce.

May
May 28
 * Andrew Del Rio is born on Earth.

September
September 15
 * James Cutter was sent to the UNSC School of the North Star, on Earth, to study astro-navigation and political science.

Circa 2500
Around 5 years after 2495 Start of the 26th century Between October 21, 2499 to October 19, 2501
 * The UNSC wrests control of Meridian from the Sundered Legion during the Siege of Athea.
 * The UNSC initiates Operation: KALEIDOSCOPE, a series of highly classified surgical strikes against prominent insurrectionist leaders.
 * Carlos Wambua is born.