One nation , Japan had two cities bombed ; Hiroshima and Nagasaki .
Hiroshima and Nagasaki
The US bombed the Japanese city of Horoshima with an atomic bomb .
See: Atomic bombings of Hiroshima and Nagasaki
The second atomic bomb, "Fat Man" was dropped on Nagasaki August 9, 1945 and exploded at 11:02 AM (JST). (The first atomic bomb, "Little Boy", was dropped on Hiroshima, Japan, on August 6 1945.)
Paul Tibbets flew the Enola Gay and dropped the atomic bomb upon the Japanese city of Hiroshima whereas pilot Charles Sweeney flew Bockscar and bombed Nagasaki with a nuclear weapon .
The 'Atomic Bomb'.
When Japan bombed Pearl Harbor that was a reason for the USA to enter WWII. It then led to the atomic bomb.
Hiroshima was bombed on august 6th 1945 and Nagasaki was bombed on the 9th.
plutonium + weapon
There were no atomic bombs used in or on Germany.
We had the machinery and minds able to do what some primitive countries probably did not have at the time to develop the atomic bomb. Also we had resources capable of making such a weapon that other countries didn't.