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  Yalta, Roosevelt, and Churchill discussed with Stalin the conditions under which the soviet union would enter the war against world war 2
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  they made sure to disarm and demilitarize Germany, which would be divided into four Allied occupation zones controlled by the United States, Great Britain, France, and the Soviet Union.
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  The berlin blockade cuts off all land and rivers between west Germany and west berlin
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  The creation of Nato secures peace in Europe, cooperates with its members, and guards their freedom
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  Koreans invaded in a coordinated general attack at several strategic points along the 38th parallel
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  The Revolución Cubana known as the Cuban revolution in Spanish was a military force and political effort to overthrow the government
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  a competition between the United States and the Soviet Union to develop aerospace , including artificial satellites, unmanned space probes, and human spaceflight.
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  American spy plane near Francis Gray powers was shot down by soviet air space
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  A failed attack by the CIA during the Kennedy administration
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  Military and german police sealed off arteries to west berlin.
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  A Guarded concrete barrier encircled West Berlin from 1961 to 1989, separating it from East Berlin and East Germany
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        the process of internal disintegration within the Soviet Union which resulted from the end of the country's and its federal government's existence - 
  
  a costly divisive conflict between the communist government of North Vietnam against South Vietnam and its principal ally