This page is about the faction as it appears in Fallout 3 and 4. For the non-canon faction from Fallout Tactics, see Brotherhood of Steel (Midwest).


The Chicago detachment,[1] also known as the Eastern Brotherhood,[Non-game 1] is a rogue chapter of the Brotherhood of Steel that had fallen off of the radar of the organization's other chapters by 2254.[1]


The Chicago detachment's origins lie in the airships dispatched by the West Coast Brotherhood of Steel to track down the remaining Super mutants.[2][3] While the majority of these airships were destroyed or scuttled, one crash-landed in the Midwest.[3] The survivors organized themselves into a new chapter near Chicago, but by 2254 they had gone rogue, cutting all contact with the larger Brotherhood.[1] This detachment at some point combatted a group of Super Mutants originating from the west,[2] resulting in either the destruction of assimilation of the group.[Non-game 1] The expedition that would become the Brotherhood's Eastern Division attempted to restore contact during their journey to the Capital Wasteland,[Non-game 1] but did not succeed.


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

Behind the scenes

This faction is based on the Midwestern Brotherhood of Steel from the spin-off game Fallout Tactics, which was declared no longer canon by Bethesda.[Non-game 2]


  1. 1.0 1.1 1.2 The Lone Wanderer: "Then where's the rest of the Brotherhood?"
    Reginald Rothchild: "The West Coast, unless something has changed. There's been no contact with them for the last several years. There's also a small detachment in Chicago, but they're off the radar. Gone rogue. Long story."
    (Reginald Rothchild's dialogue)
  2. 2.0 2.1 The Lone Wanderer: "Care to share anything about the Super Mutants?"
    Elizabeth Jameson: "The Brotherhood has been battling Super Mutants for decades. First out West, then in Chicago. Now here. But this group of Super Mutants is different, somehow. Physically, yes, but mentally as well. If we knew where they came from, we'd know why."
    (Elizabeth Jameson's dialogue)"
  3. 3.0 3.1 Brotherhood soldier (1): "I still can't believe I was posted to the Prydwen. I mean, look at her... she's one of a kind."
    Brotherhood soldier (2): "Actually, the Brotherhood of Steel had a whole fleet of these things at one time. They weren't as advanced as the Prydwen, mind you... but seeing them fill the sky must have been an impressive sight."
    Brotherhood soldier (1): "Are you kidding me? What happened to them?"
    Brotherhood soldier (2): "Not sure, really. Most of them were destroyed fighting Super Mutants or scuttled for parts. I think one of them crash landed somewhere in the Midwest. I heard that the wreckage is still there."
    Brotherhood soldier (1): "Wow... I had no idea."
    Note: ConvBoSAirportPrydwen07Scene[verification needed]
  1. 1.0 1.1 1.2 Fallout 3 Official Game Guide Game of the Year Edition p.71: "Elder Owyn Lyons
    Lyons, 75, was already highly decorated when he set out from the order's West Coast headquarters, leading a party of soldiers on a mission to reestablish contact with the 'Eastern Brotherhood.' He discovered this abandoned Pentagon military complex. The presence of Super Mutants sent a chill up the collective spine of the Brotherhood; these weren't the children of the dreaded Master, nor were they the remnants of the band that fled east and were ultimately destroyed (or assimilated into the Brotherhood of Steel) in the Chicago area. No, this was a new breed of Super Mutant, one with a local origin. But where did they come from? What did they want? How were they reproducing? Elder Lyons was ordered to discover the source of this new Super Mutant infestation and wipe it from the face of the earth. Recent weeks have seen him galvanize his 'Pride' to thwart the remnants of the Enclave forces, and to provide drinking water to all."
    (Fallout 3 Official Game Guide Game of the Year Edition Wasteland Census)
  2. Todd Howard: "For our purposes, neither Fallout Tactics nor Fallout: Brotherhood of Steel happened."
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