Cold War By s1761814 May 8, 1945 Cold war begins Mar 5, 1946 Winston Churchill's Iron Curtain Speech Mar 12, 1947 Truman Doctrine for economic assistance for Greece and Turkey Apr 3, 1948 Pres. Truman signed the Marshall Plan Apr 4, 1949 The formation of NATO May 12, 1949 Soviets lifts the blockades May 14, 1955 Warsaw Pact