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  Churchill’s speech, considered one of the opening volleys announcing the beginning of the Cold War.
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  Truman establishing that the US would provide political, military & economic assistance to all nations under threat from authoritarian forces.
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  system created by the Soviet Union providing aid & rebuilding countries in Eastern Europe that politically and economically aligned with the Soviet Union.
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  United States begins massive airlift of food, water, and medicine to the citizens of West Berlin
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  the Soviet Union blocked the Western Allies' railway, road, and canal access to the sectors of Berlin under Western control.
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  U.S. program providing aid to Western Europe following the devastation of World War II.
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  created in 1949 by the United States, Canada, and several Western European nations to provide collective security against the Soviet Union.
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  the Soviets successfully constructed an atomic bomb that could wipe out an entire continent
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  collective defense treaty signed in Warsaw
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  nationwide revolution against the Hungarian People's Republic and its Soviet-imposed policies
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  The Berlin Wall was a guarded concrete barrier that physically and ideologically divided Berlin
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  joint invasion of Czechoslovakia by the Soviet Union, Poland, Bulgaria, East Germany and Hungary