OrdnanceLittle Boy (Mark I)Little Boy (Mark I)Little Boy (Mark I)KindBombService193119321933193419351936193719381939194019411942194319441945United States · Pacific6 Aug 1945 – 6 Aug 1945Aircraft 1193119321933193419351936193719381939194019411942194319441945B-29 Silverplate6 Aug 1945 – 9 Aug 1945