Origins of Cold War (1945-1949) By chialin Feb 4, 1945 Yalta Conference Period: Feb 4, 1945 to Dec 31, 1949 Origins of Cold War Jul 17, 1945 Potsdam Conference Feb 22, 1946 Kennedy's Long Telegram Mar 5, 1946 Iron Curtain Speech Jul 1, 1946 Clifford-Elsey Report Mar 12, 1947 Truman Doctrine Feb 21, 1948 Czech coup Mar 17, 1948 Brussels Pact Apr 3, 1948 Marshall Plan Jun 24, 1948 Berline Blockade Apr 4, 1949 NATO (North Atlantic Treaty Organisation) May 11, 1949 Berline Blockade comes to an end