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When the Japanese attacked Pearl Harbor.
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At Midway Islands in the Pacific with the Japanese fleet encountering its first major defeat of the war against the United States military.
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signed into agreement between the Prime Minister of Great Britain, Winston Churchill, and President Franklin D. Roosevelt in Hyde Park, New York.
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200th anniversary of Thomas Jefferson's birth by President Franklin D. Roosevelt.
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Allied soldiers stormed the beaches of France to begin the World War II invasion of Europe that would lead to the liberation of Paris.
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The United States military begins to retake the island of Guam after Japanese troops had occupied the island during World War II
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is exploded at Alamogordo, New Mexico, after its production at Los Alamos
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President Harry S. Truman gives the go-ahead for the use of the atomic bomb with the bombing of Hiroshima. Three days later, the second bomb is dropped on Nagasaki, Japan.
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US soldiers leave Korea after the war has ceased fire.