Who founded a U.S. arms development firm that is best known for an American submachine gun, invented by John T. Thompson in 1918, that became infamous during the Prohibition era?
Auto-Ordnance Company: Auto-Ordnance was a U.S. arms development firm founded by retired Colonel John T. Thompson of the U.S. Army Ordnance Department in 1916. 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.
Colonel John T. Thompson