Cold War Timeline By cpederse Oct 24, 1945 United Nations Formed Mar 12, 1947 Truman Doctorine Nov 24, 1947 "Hollywood Ten" Apr 3, 1948 Marshall Plan Apr 4, 1949 NATO formed Jun 25, 1953 Korean War Aug 2, 1955 Space Race/Sputnik Nov 1, 1955 U.S. oficially enters vietnam war Apr 17, 1961 Bay of Pigs Aug 13, 1961 Berlin Wall Goes Up Dec 24, 1979 Soviets invade Afghanistan Nov 9, 1989 Berlin Wall Comes Down