Cold War By haelszasz Sep 21, 1944 Henry Wallace Madison Garden Speech Feb 4, 1945 Yalta Conference begins Period: Feb 4, 1945 to Feb 11, 1945 Yalta Conference May 8, 1945 V-E Day Aug 6, 1945 Hiroshima Aug 9, 1945 Nagasaki Aug 15, 1945 V-J Day Oct 24, 1945 UN officially formed Oct 27, 1945 Truman's Navy Day speech Feb 1, 1946 Stalin's Bolshoi Speech Feb 22, 1946 Kennan "Long Telegram" Mar 12, 1947 Truman Doctrine introduced Jun 5, 1947 Marshall Plan introduced Jul 26, 1947 National Security Act signed Period: Jun 24, 1948 to May 12, 1949 Berlin Blockade Apr 4, 1949 NATO agreement signed May 12, 1949 Berlin blockade lifted Apr 14, 1950 NSC-68 issued Jun 25, 1950 Korean War begins