Icon disambig
For all pre-War Commonwealths, see Location.
Gametitle-FO2Gametitle-FO3Gametitle-FNVGametitle-FNV LRGametitle-FO4Gametitle-FO4 FH
Gametitle-FO2Gametitle-FO3Gametitle-FNVGametitle-FNV LRGametitle-FO4Gametitle-FO4 FHGametitle-FO76Gametitle-FO76 WLGametitle-FOTGametitle-VBGametitle-JES
Fo Midwest Commonwealth
Fo Midwest Commonwealth

The Great Midwest Commonwealth or Midwest Commonwealth was one of the thirteen commonwealths of the pre-War United States of America.


Created in 1969, it was comprised of the former states of Wisconsin, Minnesota, Illinois, Indiana, and Michigan.[1][2] The commonwealth bordered the Northern Commonwealth, the Plains Commonwealth, the East Central Commonwealth, and the country of Canada.

Former MidwestEdit

John Cassidy mentions that there are miles-wide twisters in the Midwest and this region is one big radioactive dustbowl.[3] He mentions that he regrets not exploring the area in his youth.[4]

Former IllinoisEdit

After the fall of the Master in the far west, a great migration of super mutants began. They traveled east to find themselves a new home until they found a crashed Brotherhood of Steel zeppelin, which was a part of an air convoy that was meant to find and destroy the remains of Master's Army. Brotherhood Paladin Latham dueled mutant leader Gammorin and won. As unlikely it may seem, Latham took his opponent's name and became the new leader of the mutant army, setting up the base known as Osceolla near the airship crash site. Corporal Armstrong is mentioned as serving in either the 4th or 13th Great Midwest Commonwealth Armored Infantry Division.

Following the defeat of the Master, the Brotherhood of Steel suffered an internal conflict between reformists and traditionalists. Ultimately those that wished for reforms were sent east on an expedition to survey the extent of the remaining super mutant threat. A small fleet of airships was used in this task, with all but one being taken down by a storm as they crossed the Rocky Mountains. The surviving members of the expedition landed just outside of Chicago. The technology-worshipping Reaver cult, based in Newton is also an organization located here.

Far from the elders in Lost Hills, a new Midwestern Brotherhood chapter was formed. It diverged heavily from Brotherhood orthodoxy, incorporating many small towns, protecting the locals from raiders and other threats, and distributing advanced technology. They also began openly recruiting not just wastelanders, but ghouls, super mutants, and even talking deathclaws. By 2197, they had firmly established a neo-feudal society around Chicago.

The Brotherhood would expand outwards into the state as threats presented themselves. The local raider bands would try to take over Rock Falls, while Beastlords would threaten the city of Quincy. Some of the other major towns include the Junktown-like Junction City, Cold Water, famous for its casino; and Great Bend, a major pre-War industry center. The dying town of Macomb, as well as numerous small settlements and tribes (like Peoria, Brahmin Wood, and Dirt Haven), are located here as well.

Another expedition would be sent east by the Brotherhood of Steel in 2254, this time with the destination being Washington D.C. as part of this expedition, contact was to be made with chapters of the Brotherhood in the region. The Midwestern Brotherhood was contacted and confirmed they were still operating out of Chicago, after a recently waged war against a band of super mutants.

Elizabeth Jameson mentions Chicago when explaining to the Lone Wanderer the ongoing super mutant conflict the Brotherhood of Steel has been embroiled in over the last few decades.[5][6]

The Enclave maintained an outpost in Chicago. In the message Whitley recorded and stored before sending ED-E to Navarro, he requests anyone at the Chicago outpost to give the unit any repairs it needs.[7] When ED-E made it to Chicago, it was a young boy named Tommy, his father and mother that helped with the repairs.[8]

Before the Great War, Detective Nick Valentine together with his fiance Jennifer Lands transferred from the Chicago Police to Boston to assist the Boston Police Department in Operation Winter's End.

An Appalachian resident named Shawn Aaronholt wrote a note that mentions Chicago, and that he disagreed with his brother Lowell about moving there, wanting to head to the south instead.[9] A note titled Last will and testament written by Lowell also mentions Chicago, in that he wishes he would have gone there.[10]

Former MichiganEdit

Detroit is mentioned in the Eden Meadows Cinemas terminal entries as having manufactured Roborilla, a fictional American-made robot featured in an upcoming movie Manzilloid vs. Roborilla.[11]

In Appalachia, a man named Johnny Weston mentions to the player character that he may or may not be from Detroit and refuses to tell them his origins.[12]

Major factionsEdit

Known locationsEdit

Name of location Former state Game(s)
Bunker Alpha Illinois Gametitle-FOT
Bunker Beta Illinois Gametitle-FOT
Bunker Gamma Illinois Gametitle-FOT
Chicago Illinois Gametitle-FOT Gametitle-FO3 Gametitle-FNV Gametitle-FO4 Gametitle-FO76
Dirt Haven Illinois Gametitle-FOT
Freeport Illinois Gametitle-FOT
Macomb Illinois Gametitle-FOT
Peoria Illinois Gametitle-FOT
Freeport Illinois Gametitle-FOT
Quincy Illinois Gametitle-FOT
Rock Falls Illinois Gametitle-FOT
Springfield Illinois Gametitle-FOT
Detroit Michigan Gametitle-FO4 FH Gametitle-FO76 WL



The Great Midwest Commonwealth appears in Fallout Tactics, and is mentioned in Fallout, Fallout 3, Fallout: New Vegas and its add-on Lonesome Road, Fallout 4, Van Buren, its tech demo, and in the Fallout 76 Wastelanders update.


  1. Plaque on the Massachusetts State House in Fallout 4 gives 1969 as the formation date of the "Thirteen commonwealths."
  2. Named Midwest Commonwealth in J.E. Sawyer's Fallout Role-Playing Game.
  3. John Cassidy: "{363}{}{I hear they got twisters miles wide in the Midwest. It's a big ol' radioactive dustbowl now.}"
    (John Cassidy's dialogue)
  4. John Cassidy: "{362}{}{If I was twenty years younger, I'd go east and explore the Midwest. Too late now, I s'pose.}"
    (John Cassidy's dialogue)
  5. 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)
  6. 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)
  7. Whitley: "Subject E: Diagnosis complete. Begin Recording.
    My name is Whitley. I'm a researcher at Adams Air Force base. Until recently I was in charge of the Duraframe reinforcement project for the combat model Eyebots. Eyebot Duraframe Subject E is both the prototype, and the last functional model in this test group. I was prepared to make several significant upgrades to the machines. However, as the project was canceled and all Duraframe assets are being diverted to Hellfire Armor, I am sending this model to the Navarro outpost. If you are listening to this log from one of our Enclave Outposts in Chicago, give this unit whatever repairs it needs so it can continue to Navarro."
  8. The Courier: "Sounds like that kid was pretty fond of you. Why did you leave?"
    ED-E: Wistful beeping
    The Courier: "Where did this happen?"
    ED-E: Happy beeping
    The Courier: "Illinois? So that's where you got that plate. The other you, I mean."
    ED-E: Happy beeping
    The Courier: "What's a Chicago?"
    ED-E: Expository beeping
    (ED-E's dialogue)
  9. Shawn's journal: "John and I are sick of hearing Lowell talk about Chicago all the damn time. Lowell wants us to pack up and head that way. Who gives a shit about Chicago? I always thought we should travel more south to see if any of our cousins survived."
  10. Lowell Aaronholt's last will and testament: "To whomever finds my body- The granary shed holds provisions that should last you a little while. I ponder what became of my brothers Shawn and John. I should have gone to Chicago."
  11. Eden Meadows Cinemas terminal entries; Manzilloid vs. Roborilla
  12. Resident: "Where are you from originally?"
    Johnny Weston: "I don't really talk about it. I'm from all over. I used to see a lot of military bases as a kid, until I struck out on my own. When the bombs dropped, I was living in New York. Or maybe, Boston. Or coulda been Detroit, or LA. Maybe even England. Sorry you don't get to know. No one does. I've got my reasons for keeping it that way, and I'm safer for it."
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