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president Harry S. Truman gave a speech about lending aid to smaller countries in need and it was made into a doctrine
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this was to help Nations after world war 2 with money
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it was where Soviet union blocked passage to the United States allies so they had to drop it off by plane
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"to provide collective security against the Soviet Union"
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this was when North Korea invaded South Korea trying to make them communist and to "Hoping to reunify Korea by force" (Kim II sung).
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a armistice was sighed by president Eisenhower to stop the fighting and divided north and south Korea by the 38th parallel
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treaty
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this doctrine was to help stop the spread of communism aka containment of communism
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the first satellite in space
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a spy plane was shot down by the Soviet union defense force