Allied Forces-Covenant Extinction War

The Extinction War, also known as the Allied Forces-Covenant Extinction War or the War for the Great Journey, is a war that has been going on for over 800 years between the Allied Forces and the Covenant Hegemony. It started when the Covenant attempted to annex the Elvish Republic and was met with firm resistance from all elves save the Drow. Quickly, the Local Group (the Milky Way Galaxy, the Andromeda Galaxy, the Triangulum Galaxy, and their various satellites) was divided between the two sides, and war spread like wildfire.

The war in the Milky Way Galaxy is currently separated from the other members of the Local Group due to severe damage to the Milky Way Maw Network, which is currently thought to be irreparable.