Type Submachine gun Place of origin United States Service history In service 1943–present Wars World War II[Chinese Civil WarGreek Civil WarFirst Indochina WarKorean WarCuban RevolutionAlgerian WarBay of Pigs InvasionVietnam WarThe TroublesLaotian Civil WarSino-Indian WarRhodesian Bush WarCambodian Civil WarTurkish invasion of CyprusShaba IICambodian–Vietnamese WarSino-Vietnamese … Continue reading M3 submachine gun