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is a philosophical, social, political and economic ideology and movement whose ultimate goal is the establishment of a communist.
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was a federal socialist state in Northern Eurasia that existed from 1922 to 1991.
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is an intergovernmental organization that aims to maintain international peace.
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is a geopolitical strategic foreign policy pursued by the United States.
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sets additional eligibility conditions for presidents who succeed to the unexpired terms of their predecessors.
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was an American foreign policy the stated purpose of which was to contain Soviet geopolitical expansion during the Cold War.
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was one of the first major international crises of the Cold War.
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was an American initiative passed in 1948 for foreign aid to Western Europe.
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is an intergovernmental military alliance between 30 European and North American countries.
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a political event in one country will cause similar events in neighboring countries, like a falling domino causing an entire row of upended dominoes to fall.
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was a war between North Korea and South Korea.
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were American citizens who were convicted of spying on behalf of the Soviet Union.
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in the first successful full-scale thermonuclear weapon explosion.
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This vaccine contains killed virus and is given by injection.
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was an informal 20th-century competition between two Cold War rivals, the Soviet Union (USSR) and the United States.
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The earth's first artificial satellite.