The seven men were ordered to line up against a brick wall. The attackers then opened fire with Thompson submachine guns and shotguns, firing over 70 rounds.
Led by the infamous Alphonse "Al" Capone , who sought total control over Chicago's illegal bootlegging operations.
The massacre had immediate and lasting impacts on American law and society:
Moran himself narrowly escaped the carnage because he was late to the meeting and spotted the "police" car outside, choosing to wait at a nearby diner instead. Historical Significance and Aftermath
The on February 14, 1929, stands as the most notorious gangland execution in American history, marking the violent peak of the Prohibition era in Chicago. The Conflict: Capone vs. Moran
Six died instantly, while the seventh, Frank Gusenberg, lived for a short time but refused to break the "code of silence" before he died.
Four to six assailants entered the garage. At least two were disguised in police uniforms, leading the victims to believe it was a routine raid.