<Table> <Tr> <Th_colspan="2"> Atomic bombings of Hiroshima and Nagasaki </Th> </Tr> <Tr> <Td_colspan="2"> Part of the Pacific War of World War II </Td> </Tr> <Tr> <Td_colspan="2"> Atomic bomb mushroom clouds over Hiroshima (left) and Nagasaki (right) </Td> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Th> Date </Th> <Td> August 6 and August 9, 1945 </Td> </Tr> <Tr> <Th> Location </Th> <Td> Hiroshima and Nagasaki, Empire of Japan </Td> </Tr> <Tr> <Th> Result </Th> <Td> Allied victory </Td> </Tr> </Table> </Td> </Tr> <Tr> <Th_colspan="2"> Belligerents </Th> </Tr> <Tr> <Td> United States Manhattan Project: United Kingdom Canada </Td> <Td> Japan </Td> </Tr> <Tr> <Th_colspan="2"> Commanders and leaders </Th> </Tr> <Tr> <Td> William S. Parsons Paul W. Tibbets, Jr . Charles Sweeney Frederick Ashworth </Td> <Td> Shunroku Hata </Td> </Tr> <Tr> <Th_colspan="2"> Units involved </Th> </Tr> <Tr> <Td> Manhattan District: 50 U.S., 2 British 509th Composite Group: 1,770 U.S. </Td> <Td> Second General Army: Hiroshima: 40,000 (5 Anti-aircraft batteries) Nagasaki: 9,000 (4 Anti-aircraft batteries) </Td> </Tr> <Tr> <Th_colspan="2"> Casualties and losses </Th> </Tr> <Tr> <Td> 20 British, Dutch, and American prisoners of war killed </Td> <Td> <P> Hiroshima: </P> <Ul> <Li> 20,000 soldiers killed </Li> <Li> 70,000--126,000 civilians killed </Li> </Ul> <P> Nagasaki: </P> <Ul> <Li> 39,000--80,000 killed </Li> </Ul> Total: 129,000--226,000 + killed </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Atomic bombings of Hiroshima and Nagasaki </Th> </Tr>

When did us drop atomic bomb on hiroshima and nagasaki