Western Europe 's postwar economic recovery . In June , 1948 , Yugoslavia was expelled from the Communist bloc for being too independent . In the same month , the Soviet Union closed all road , rail , and canal links between Western Germany and West Berlin (located deep in the Soviet zone of Germany , in an effort to force the Western allies out of that city (Under the Yalta agreement , the Western allies were to share administration of Berlin with the Russians . The United States rushed...











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