A timeline of all major events in the Halo universe from the time of the Forerunners through the rule of the Created.
Sometime in 2530 the colony world of Eridanus II, home world of John-117, was glassed by an unknown Covenant force.
The Battle of the Great Bear was a naval battle between a UNSC fleet of seventeen warships and three Covenant warships in the Groombridge-1830 system.
The Battle for Arcadia was a battle for the colony Arcadia in the Procyon system, which occurred in the immediate aftermath of the Harvest Campaign.
The Battle of the Etran Harborage was a battle between the UNSC Spirit of Fire and Covenant forces lead by Arbiter Ripa 'Moramee on Shield World 0459, also known as the Etran Harborage.
Operation: SMOKING ACES was a raid by Spartan-II Blue Team on an Insurrection stronghold in the 111 Tauri system.
Spartan-III Alpha company was the first of three Spartan-III companies to be recruited, trained, and put into service.
