U.S history 1877-2008 By kenneth.centeno Period: 1945 to 1957 Early Cold War Oct 24, 1945 United Nations formed Mar 12, 1947 Truman Doctrine 1948 Berlin Airlift Apr 3, 1948 Marshall Plan Apr 4, 1949 NATO established 1950 sweatt v painter Period: 1950 to 1953 Korean War Feb 27, 1951 22 Amendment Mar 29, 1951 Rosenberg Trial Nov 1, 1952 First H-bomb detonated by the United States 1954 Hernandez v Texas May 17, 1954 brown v board of education of Topeka Period: 1955 to 1956 Montgomery bus boycott Apr 12, 1955 Jonas Salk invents polio vaccine Sep 4, 1957 little rock nine Oct 4, 1957 Ussr launches Sputnik Apr 17, 1961 bay of pigs invasion Aug 13, 1961 berlin wall built 1962 cuban missile crisis Period: 1962 to 1975 Vietnam war Aug 28, 1963 Martin Luther King jr. I have a dream speech Nov 22, 1963 John F. Kennedy assassinated Jan 23, 1964 24th amendments Jul 2, 1964 civil rights act of 1964 Aug 7, 1964 gulf of Tonkin resolution Jul 30, 1965 medicare and Medicaid established Aug 6, 1965 voting rights act of 1965 1968 Tet offensive Apr 4, 1968 Martin Luther King assassinated Apr 11, 1968 civil rights act of 1968 Feb 24, 1969 tinker v des moines Jul 20, 1969 First man on the moon May 4, 1970 Kent state shooting 1971 pentagon papers leaked Jul 1, 1971 26th amendment Jun 23, 1972 Title IX Nov 7, 1973 war power act 1974 Watergate scandal 1975 fall of saigon Sep 17, 1978 camp David accords Mar 28, 1979 3 mile island disaster Jan 20, 1981 Iran hostage crisis Mar 4, 1987 iran contra affair