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  Yalta Conference meeting of FDR, Churchill, Stalin - the 'Big Three'
Soviet Union has control of Eastern Europe. The Cold War Begins - 
  
  
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  Victory in Europe. Germany surrenders to the Red Army in Berlin
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  Japanese surrender End of World War II
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  communism & capitalism were incompatible
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  underwater explosion
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  Truman declares active role in Greek Civil War
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  U.S. meet 19 Latin American countries and created a security zone around the hemisphere
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  Brussels Pact organized to protect Europe from communism
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  NATO ratified
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  Berlin Blockade ends
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  Truman approved H-bomb development
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  Truman fires MacArthur
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  A-bombs developed by Britain
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  4 Nuclear Arms Race atomic test series of 11 explosions at Nevada Test Site
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  RAND report on the "Vulnerability of U. S. Strategic Air Power"
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  Korean War ends
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  H-bomb Castle-Bravo test
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  KGB established
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  Vietnam split at 17th parallel
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  Warsaw Pact formed