World War II Ends

World War II Ends

After years of atomic weapons development done at Oak Ridge and other facilities, the U.S. drops atomic bombs on the Japanese cities of Hiroshima and Nagasaki. This leads to the surrender of Japan and the end of the most ruinous war in history.
U.S. Enters the War

U.S. Enters the War

The Japanese launch a surprise attack on the U.S. naval base at Pearl Harbor, Hawaii, which propels America into World War II. Later, Germany and Italy also declare war on the United States.