The United States jointed with World War II as the member of the Allies
because Japanese military attacked Pearl Harbor on December 7th , 1914
- The United States jointed with Britain, and the Soviet Union
- The Big Three consisted of Roosevelt, Churchill, and Stalin
- Adolf Hitler committed suicide in Berlin on April 30th , 1945
- “Manhattan Project” was produced new technology weapon that based on
principle of physics
- Scientist Produced two nuclear bombs
- On August 6th, 1945, USA dropped the first nuclear bomb on Hiroshima,
Japan
- On August 9th , 1945, USA dropped the second nuclear bomb on Nagasaki,
Japan
- On August 10th , 1945, representatives of the Japanese government signed the
formal surrender ending World War II
- The failure of the League of Nations