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Adolf Hitler and Nazi Germany invade Poland marking the beginning of the Second World War
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On this date FDR recieved the Einstein-Szliard letter which lead to the start of an American Nuclear Program
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Only 10 days after FDR recieved Einstein Szliard letter the Briggs Advisory on Uranium is created
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Japan attacks Pearl Harbor, the United States declares war on Japan a day later, and two days later on Nazi Germnay.
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After the Briggs Advisory Committee on Uruanium disbanded, and the S-1 Committee came into being, the Committee later evolved into the Manhattan Project
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General Lesile Grove is place in charge of the top secret Manhattan Project, their goal: to create an atomic bomb.
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The Quebec Agreement is signed further solidifying the Anglo-American nuclear collaboration until the end of the war.
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FDR dies and the next day Truman is inaugurated into office.
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The first nuclear bomb ever is test at the Alamogordo Bombing and Gunnery Range in New Mexico
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The Potsdam Declaration is issued calling for the unconditional surrender of Japan. Truman also tells Stalin about their WMD marking the unofficial start of the Arms Race.
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Truman makes the decesion to drop the Bomb on Hiroshima.
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Japanese and American peace talks had almost reached a close when the second bomb was dropped.
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Japan signs the Japanese Instrument of Surrender on the USS Missiouri, offically ending the war. The end of the Second World War, unofficially marking the beginning of the Cold War.
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