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At the end of the Second World War, U.S., British, and Soviet military forces divided and occupied Germany.
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communist expansion caused the US and 11 other western nations to form NATO
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the prospect of further Communist expansion prompted the United States and 11 other Western nations to form the North Atlantic Treaty Organization
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First artificial Earth satellite (Soviet Union launched)
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the government of west germany built a wall made of concrete and barbed wire across the border
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the USA finds out that the soviet union has missiles in Cuba
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apollo 11 launched and landed on the moon
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the head of east Germany announced that citizens could cross the berlin border whenever they wanted to
