Battle of Installation 00

The Battle of the Ark was a large engagement between the UNSC-Separatist Alliance, the Covenant Loyalists and the Flood.

It was the final battle of the Second Flood outbreak and is the last known battle of the Human-Covenant War and the Covenant Civil War.

The Battle took place over and on the Forerunner structure known as the Ark. This included the Ark's control room, the Flood-infested Covenant Holy City High Charity and the Halo Ring, Installation 00