Brotherhood Civil War

The  was a cold war between the Brotherhood of Steel and the Brotherhood Outcasts beginning in 2277 which is still ongoing.

Prelude
Angry that the Brotherhood are shying away from their mission, Paladin Henry Casdin deserted the BOS and formed the Outcasts, to fulfill their real mission to recover technology. The Brotherhood were wary an attack may take place, and many Brotherhood soldiers wanted the Outcasts shot or arrested for desertion.

Action
The two sides kept a close eye on one another. No fighting took place, however they did have a lot of technology rivalry.