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American forces land in Normandy, France under "Operation Overlord", signaling the invasion of Europe and counter offensive of Allied forces during World War II.
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Victory in Europe Day celebrated the defeat of the Axis powers in Europe and marked the beginning of the end of World War II.
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The United States detonates the first atom bomb under the direction of the Manhattan Project.
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The United States drops an atomic bomb on the Japanese city of Hiroshima.
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The Japanese government signs its official declaration of surrender, marking the official end of World War II.
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George Kennan sends his telegram denouncing the Soviet Union, that there is no possibility of cooperation between the United States, and that a policy of containment is needed.
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The North Atlantic Treaty Organization is founded as a mutual defense pact between the United States, Canada, England, France, Belgium, Luxembourg, the Netherlands, Italy, Portugal, Norway, Denmark, and Iceland.
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Fighting breaks out in Korea between northern communist and southern anti-communist.
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The United States detonates the first hydrogen bomb.
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After being found guilty of giving secret documents to the Soviets, Julius Rosenberg and his wife Ethel are executed as spies.