First Atomic Bomb (aug 6, 1945 – aug 9, 1945)

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This marked the beginning of U.S. involvement in World War 2. The United States dropped the world's first atomic bomb on Hiroshima and Nagasaki, in response to the bombing of U.S. military territory in Pearl Harbor. This first atomic bomb was one that would mark the future of the world, and would give unprecedented power to mankind.

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