American History since 1945 By facebooker_1299715637 Period: Jan 1, 1945 to Mar 28, 2011 U.S. History since 1045 Apr 25, 1945 United Nations first convened Period: Jan 1, 1947 to Jan 1, 1991 Cold War Period: Jun 24, 1948 to May 12, 1949 Berlin Blockade Berlin blockade Period: Jan 1, 1955 to Dec 31, 1975 Vietnam War Sep 10, 1960 OPEC formed Apr 17, 1961 Bay of Pigs Period: Jan 1, 1969 to Dec 31, 1974 Richard Nixon President Jun 17, 1972 Watergate Period: Jan 1, 1974 to Dec 30, 1977 Gerald Ford Period: Jan 1, 1977 to Dec 31, 1981 Jimmy Carter Nov 4, 1979 Iran hostage crisis begins. Period: Jan 1, 1981 to Dec 31, 1989 Ronald Reagan Jan 20, 1981 Iran hostages freed Oct 3, 1990 Berlin Wall comes down Sep 11, 2001 Wold Trade Center attack