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From Halopedia, the Halo wiki

  • The Battle of Harvest. Preston Cole's fleet engages the alien warships responsible for the decimation of the Harvest colony. Six years after the planet was attacked, UNSC forces emerged victorious at the cost of two-thirds of the battle group.
  • Cole is promoted to Admiral upon his return to Earth and learns that a number of outlying colonies have been destroyed, leaving behind no survivors.
  • Cole begins to move his fleet around, trying to intercept the invaders. Ground and ship-to-ship battles begin in earnest, raging throughout the Outer Colonies. During one ground engagement, Human forces capture one of the aliens. Before succumbing to his wounds, interrogators learn that the aliens refer to themselves as "the Covenant" (roughly translated).

May

November

November 7th: Spartans Kurt-051, Kelly-087 and Fred-104 are dispatched to investigate Construction Platform 966A for potential Rebel activity. The mission is a ruse and Kurt is abducted by ONI to lead the Spartan III project. Kurt is 'offically' declared MIA.

December

December 27th: 497 recruits arrive at Camp Currahee on Onyx beginning the Spartan III program under the command of Kurt-051 forming what will later become Alpha Company.

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