Harry Truman had decided to use the atomic bomb because he feared invasion would lead to the loss of more American troops.
The United States dropped the atomic bomb in Hiroshima Japan due to the second world war that the United States had with the Japanese people. The use of the bomb was to serve as a deterrent to the Japanese to stay away from any invasion of the United States.
This had large consequences in Japan. It polluted the area and also led to the lives of people in the nation.
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