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The U.S never joined the Cold War... It was the cold war. Right before WWII was about to end, the U.S was successful in creating the first atomic bomb and used it in Hiroshima and Nagasaki. The Soviets knew of this and researched to create an nuclear weapon of their own. This caused relations between the two superpowers to degrade, As U.S and Stalin never trusted one another, and soon led to the Cold War. (It wasn't an actual war).

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12y ago

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