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.
Only a few survivors managed to escape and by early 2544, no record of human activity remained on Alluvion.
- ↑ 1.0 1.1 Halo 2: Anniversary - Collectible: Terminal 3 - ONI File: Particular Justice
- ↑ Halo Legendary Crate - Bonus Item: First Twelve Hours
- ↑ Halo: Escalation Issue 7
- ↑ 4.0 4.1 Halo Waypoint: Universe - Alluvion