OrdnanceFat Man (Mark III)Fat Man (Mark III)Fat Man (Mark III)KindBombService193119321933193419351936193719381939194019411942194319441945United States · Pacific9 Aug 1945 – 9 Aug 1945Aircraft 1193119321933193419351936193719381939194019411942194319441945B-29 Silverplate6 Aug 1945 – 9 Aug 1945