In the late 1930s the famous Physicist Eisenhower was notified by other German Physicists the Nazis were planning to build an atom bomb. He sent a letter to President Franklin Delano Roosevelt. Roosevelt had a committee formed to determine the necessity of the US building an atom bomb and do a feasibility study if it was possible to build the atom bomb. It had never been done by any country in the world.
Meanwhile, the Japanese and the German scientists were doing the same thing. Eventually all three countries started their own programs to create atom bombs.
The Germans ended up not building any atomic bombs even though they had the knowledge and people who could build an atomic bomb. They had told Hitler it was too expansive and could not be done quick enough to win the war. He fell for it.
BUT the Germans supplied uranium for the Japanese scientists who were working on the bomb. Some of this uranium was captured by the Americans at the end of the European side of the war. So they used some of Japan's uranium on the Japanese: this is known as the irony of the atomic bomb.
Therefore the atomic bomb intended for Germany came to be used on Japan instead when the Allied Forces were forced to consider a way to avoid the invasion and fighting on the mainland island of Japan. Truman made the final decision to drop the atom bomb in the Japanese Military leaders would surrender. Avoiding the possibility of millions of Japanese deaths and allied deaths was the number one motivation for using the atomic bomb on Japan.
For the entire story of the development and history of the first atomic bombs see the related link below.
They were dropped on Hiroshima and Nagasaki.
Japan did not drop any atomic bombs. Rather, the US dropped two atomic bombs on them. The cities that were hit were Hiroshima and Nagasaki.
Hiroshima and Nagasaki
The atomic bomb was dropped on Hiroshima and Nagasaki RB
The atomic bomb was dropped on Hiroshima Nagasaki by the US from parachute.
Hiroshima and Nagasaki
Hiroshima and nagasaki
On August 6th and 9th 1945, the US dropped 2 atomic bombs onto Japan which caused just over 200,000 people dead and many more scared from life. The 2 cities which the atomic bombs were dropped on were Hiroshima and Nagasaki.
Hiroshima and Nagasaki where the cities where the atomic bombs were dropped over in Japan.
The atomic bomb that was dropped on Hiroshima was named "Little Boy." The atomic bomb that was dropped on Nagasaki was named "Fat Man."
Hiroshima and Nagasaki.
Hiroshima and Nagasaki.