The Battle of Alluvion was a battle fought between the United Nations Space Command and the Covenant Empire in 2542 on the human colony of Alluvion.[3]


Covenant scouting patrols located Alluvion in 2541, signaling a full-scale invasion one year later, in 2542. The UNSC managed to defend Alluvion with a substantial military force, keeping the enemy at bay for weeks, before a Covenant support fleet arrived, severing critical support lines and glassed major population centers and spaceports.[4]


Only a few survivors managed to escape and by early 2544, no record of human activity remained on Alluvion.[4]



  1. 1.0 1.1 Halo 2: Anniversary - Collectible: Terminal 3 - ONI File: Particular Justice
  2. Halo Legendary Crate - Bonus Item: First Twelve Hours
  3. Halo: Escalation Issue 7
  4. 4.0 4.1 Halo Waypoint: Universe - Alluvion

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