Cold War Timeline By lukixd Feb 11, 1945 Yalta Agreement Mar 12, 1947 Truman Doctrine Jun 5, 1947 Marshal Plan Jun 24, 1948 Berlin Airlift Apr 4, 1949 NATO Formed Jun 25, 1950 Korean War Begins Jun 27, 1953 Korean War Ends Aug 24, 1953 Soviet Union Tests First Hydrogen Bomb Mar 4, 1954 U.S. First Hydrogen Bomb Test Apr 9, 1954 McCarthy Hearings May 14, 1955 Warsaw Pact Organized Oct 4, 1957 Launch of Sputnik Apr 9, 1961 Bay of Pigs Aug 13, 1961 Berlin Wall Built Oct 14, 1962 Cuban Missile Crisis Jun 20, 1963 Installation of a Hot Line Nov 17, 1969 (SALT) begins Dec 24, 1979 Invasion of Afghanistan Dec 8, 1987 Intermediate Range Nuclear Forces Treaty Nov 9, 1989 Berlin Wall comes down Oct 3, 1990 Unification of East and West Germany Dec 31, 1991 Collapse of the Soviet Union