Chicago

Chicago was a city located in the pre-War state of Illinois.

Background
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. In addition, 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. It is also where Tommy recovered ED-E, and after pleading with his father, brought it back to his mother's garage for repairs.

Sometime after the defeat of the Master, the Brotherhood of Steel dispatched at least one airship, to track down the remnants of the Unity Super Mutant threat. The airship crash landed near the ruins of Chicago. The surviving members of the first expedition thrived outside of Chicago. Far from the elders in Lost Hills, a new Brotherhood of Steel chapter was formed. The survivors initially organized themselves into a new detachment, cutting all contact with the larger Brotherhood.

Another expedition was sent east by the Brotherhood of Steel, 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 Brotherhood was contacted and confirmed they were still operating out of Chicago, after a recently waged war against a band of super mutants.

In the Commonwealth, the city is mentioned on the holotape Welcome home!, as well as the source of the Skylanes 1981 flight in Skylanes Smuggling Manifest. 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 south to settle instead. A note titled Last will and testament written by Lowell also mentions Chicago, in that he wishes he would have gone there. The city is also mentioned as where former astronaut and possible ally Sofia Daguerre lived as a child.

Appearances
Chicago is mentioned in 'Fallout Tactics, Fallout 3, the Fallout: New Vegas add-on Lonesome Road, Fallout 4, and Fallout 76.''

Behind the scenes
Chicago is a real world city of the same name.