The Atomic Bomb
The End of the War With Japan
The Manhattan Project
When the war started, the atomic bomb had not yet been invented. The United States received word that the Germans were working on nuclear weapons and so they began to research the possibilities. Scientists, including Albert Einstein, discovered that a powerful explosion might be possible by splitting an atom. This type of bomb could destroy large cities in a single blast and would change warfare forever. The code name for the research and development of the bomb was The Manhattan Project.
The Big Decision
Germany had already surrendered and World War II in Europe was over. Japan would not surrender. The US was deciding on an invasion of Japan. Army leaders figured that anywhere from 500,000 to 1 million Allied soldiers would die in an invasion. President Truman decided to drop the atomic bomb instead.