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US enter World War II when Japan Bombs Pearl Harbor
December 1941: Japan bombs Pearl Harbor and the United States enters World War II. -
Manhattan Project Approved by US Government
1942: Physicist J. Robert Oppenheimer becomes director of the Manhattan Project, a U.S. government program formed to secretly build and test an atomic bomb. The project originally began to counter Nazi Germany. -
US Detonates Atomic Test Bomb
July 16, 1945: The United States successfully detonates the worlds first atomic bomb at the Trinity test site in the desert of New Mexico. -
Atomic Bomb Dropped on Hiroshima, Japan
August 6,1945: The first atomic bomb to be used as a weapon is dropped on Hiroshima, Japan, at approximately 8:15 a.m. Nicknamed Little Boy, the bomb is released from the Enola Gay, a B-29 bomber piloted by Brig. Gen. Paul Tibbets. It explodes 2,000 feet above ground, killing 80,000 people instantly. One of the main arguments for use of the bomb by U.S. officials is that it would force Japan to surrender unconditionally. -
Atomic Bomb Dropped on Nagasaki, Japan
August 9, 1945: An atomic bomb is dropped over Nagasaki, Japan, by a B-29 bomber piloted by Maj. Charles Sweeney. It explodes 1,540 feet above the ground. The original target for the bomb, nicknamed Fat Man, is Kokura, Japan. Due to cloud cover, the bomb is instead detonated over Nagasaki, the alternate location. It is estimated that 75,000 people are killed i -
President Truman Addresses the US about the bombs
1945: Three days after the Hiroshima bombing, President Truman speaks to the nation in a radio address: The world will note that the first atomic bomb was dropped on Hiroshima, a military base. By this time, the United States had already dropped its second bomb on Nagasaki. -
Japan Surrenders
August 15, 1945: Japan surrenders, ending World War II. -
140,000 Dead in Japan
140,000 people were killed within a few months of the bombs being dropped on Japan -
Hiroshima Timeline
Hiroshima and all the sickness and death
