Brotherhood of Steel (Chicago detachment)

The Chicago detachment of the Brotherhood of Steel is a small, rogue unit that has dropped off the radar of the Brotherhood's other chapters.

Background
This detachment has been battling super mutants in Chicago, following on the struggle with the Unity in New California, after its airship crash landed in the city.

Appearances
The Chicago detachment of the Brotherhood of Steel is mentioned only in Fallout 3 and Fallout 4.

Behind the scenes
This faction is all that remains from Fallout Tactics. Fallout 3 explicitly retconned nearly the entire game, while Todd Howard explained in a related interview that as far as Bethesda is concerned, neither Fallout Tactics nor Fallout: Brotherhood of Steel happened.