Brotherhood Civil War

The  was a conflict between the Brotherhood of Steel and the Brotherhood Outcasts beginning in 2276 which is still ongoing.

Prelude
Angry that the Brotherhood are drifting away from their original mission of collecting and improving pre-war technology, Paladin Henry Casdin deserted from the Brotherhood of Steel and formed the Brotherhood Outcasts, to fulfill the official BoS mission of recovering technology. The Brotherhood were wary an attack may take place, and many Brotherhood soldiers wanted the Outcasts shot or arrested for desertion.

Action
While there were no official battles in this war, whenever members of the two groups encountered each other, which was rare, fighting would break out, only ending when one or the other group was dead. The frequency of their encounters increased after Project Purity went online in 2278 and the Brotherhood of Steel began assisting with Aqua pura deliveries across the Capital Wasteland, thus taking them into territory held by the Outcasts.