The main events that lead to the Manhattan Project were Pearl Harbor and Japan's refusal to sign the ultimatum. Originally the U.S had acted as a neutral country in the war, however, was clearly favoring their brothers from the east, Britain. This lead to Japan deciding to unleash an attack on …show more content…
President Franklin D. Roosevelt had set up a team of scientists to study Uranium and Plutonium as the main radioactive tools in the first ever nuclear weapon. With great success by the scientist team and the Army Corps Engineers, the government had decided to move forward with the project and fund the testing of the nuclear weapon. President Franklin D. Roosevelt had named the project the “Manhattan Project” and had begun finally testing the nuclear weapon. On July 16th, 1945 the Trinity test was taken and the results were that the first ever successful nuclear weapon had just been created and detonated. The atomic bomb had the power of 21,000 tons of TNT and the mushroom cloud had stretched 40,000 feet across. The U.S. had planned on ending World War Ⅱ with this new deadly weapon. Since Japan wouldn’t be convinced to surrender the war, the U.S. had planned on using force to make them surrender. The next thing that happened was the dropping of the “Little Boy” bomb on Hiroshima, Japan on August 6th, 1945. The pure devastation had proven to be substantial however the U.S. wasn’t convinced that the bomb would do the trick. This lead to the dropping of the “Fat Boy” bomb on Nagasaki, Japan on August 9th, 1945. The atomic bombs had left Japan with over 100,000 civilians killed. This major loss of people had led Japan to surrender in hopes of avoiding another destructive hit such as those in Hiroshima and