Who invented Machine Gun Kelly's favorite weapon?
Thompson submachine gun The Thompson submachine gun is an American submachine gun, invented by John T. Thompson in 1918, that became infamous during the Prohibition era. It was a common sight in the media of the time, being used by both law enforcement officers and criminals. The Thompson submachine gun was also known informally as the "Tommy Gun", "Annihilator", "Chicago Typewriter", "Chicago Piano", "Chicago Style", "Chicago Organ Grinder", "Trench Broom", "Trench Sweeper", "The Chopper", and simply "The Thompson".
John J. Kelly John Joseph Kelly (June 24, 1898 – November 20, 1957) was a United States Marine who was awarded both the Army and Navy Medals of Honor for his heroic actions on October 13, 1918 at the Battle of Blanc Mont Ridge, France during World War I. He was the last surviving of 19 two-time Medal of Honor recipients when he died.