Vietnam War & Cold war By cheywashere 1947 Truman Doctrine issued 1948 Berlin Blockade 1948-1949 1950 Korean War 1950-1953 1955 Start of U.S. advisory role in Vietnam 1960 U-2 Incident Nov 22, 1963 President Kennedy is assassinated 1964 Gulf of Tonkin Incident and Resolution Jul 20, 1969 American astronauts land on the moon 1973 Paris Peace Accords signed; U.S. combat troops withdraw