Origins of the Cold War
The Cold War developed as differences about the shape of the postwar world created suspicion and distrust between the United States and the Soviet Union. The first -- and most difficult -- test case was Poland, the eastern half of which had been invaded and occupied by the USSR in 1939. Moscow demanded a government subject to Soviet influence; Washington wanted a more independent, representative government following the Western model. The Yalta Conference of February 1945 had produced an agreement on Eastern Europe open to different interpretations. It included a promise of "free and unfettered" elections.
Meeting with Soviet Minister of Foreign Affairs Vyacheslav Molotov less than two weeks after becoming president, Truman stood firm on Polish self-determination, lecturing the Soviet diplomat about the need to implement the Yalta accords. When Molotov protested, "I have never been talked to like that in my life," Truman retorted, "Carry out your agreements and you won't get talked to like that." Relations deteriorated from that point onward.
During the closing months of World War II, Soviet military forces occupied all of Central and Eastern Europe. Moscow used its military power to support the efforts of the Communist parties in Eastern Europe and crush the democratic parties. Communists took over one nation after another. The process concluded with a shocking coup d'etat in Czechoslovakia in 1948.
Public statements defined the beginning of the Cold War. In 1946 Stalin declared that international peace was impossible "under the present capitalist development of the world economy." Former British Prime Minister Winston Churchill delivered a dramatic speech in Fulton, Missouri, with Truman sitting on the platform. "From Stettin in the Baltic to Trieste in the Adriatic," Churchill said, "an iron curtain has descended across the Continent." Britain and the United States, he declared, had to work together to counter the Soviet threat.