Category: Chicago History

• The Chicago Underground War

  The Chicago Underground War was the theory that Chicago’s hidden freight-tunnel railway, including the small underground electric trains that later folklore sometimes called “Bunnies,” formed a covert logistics network for gangland operations during Prohibition. In the specific St. Valentine’s Day Massacre version, the theory claimed that bodies, weapons, or participants were moved through these tunnels to conceal routes of travel or dispose of evidence after the killings. The historical tunnel system was real: a freight and utility tunnel network built under downtown Chicago, with an early but short-lived mail contract and long-running freight service. The conspiracy version arose by combining that genuine underground infrastructure with the city’s gang mythology and then stretching the tunnel system beyond what is clearly documented in the massacre itself.