US History 1887-2008 By isabella.addington Period: 1776 to 1860 Early American History Period: 1860 to 1877 Civil War/Reconstruction Period: 1877 to 1900 The Gilded Age Period: 1890 to 1920 The Progressive Era Period: 1898 to 1910 Imperialism Period: 1914 to 1918 WWI Period: 1920 to 1929 Roaring Twenties Period: 1929 to 1939 The Great Depression Period: 1939 to 1945 WWII 1945 UN Formed Period: 1945 to 1960 Early Cold War 1947 Truman Doctrine 1948 Marshall Plan 1948 Berlin Airlift 1949 NATO Established 1950 Korean War Period: 1950 to 1970 Civil Right Era 1951 Rosenberg Trials 1952 First H-bomb detonated by the United States Period: 1954 to 1976 Vietnam War 1955 Jonas Salk invents Polio Vaccine 1957 USSR Launches Sputnik Jan 31, 1968 Tet Offensive Apr 11, 1968 Civil Rights Act of 1968 May 4, 1968 Assassination of Martin Luther King Jr Feb 24, 1969 Tinker v. Des Moines Jul 20, 1969 First Man on the Moon Period: 1970 to 1991 End of Cold War May 4, 1970 Kent State Shooting 1971 Pentagon Papers are Leaked Jul 1, 1971 26th Amendment Jun 17, 1972 Watergate Scandal Jun 23, 1972 Title IX Nov 7, 1973 War Power Act May 30, 1975 Fall of Saigon Sep 17, 1978 Camp David Accords Mar 28, 1979 Three Mile Island Disaster Nov 4, 1979 Iran Hostage Crisis Aug 20, 1985 Iran Contra Affair Period: 1990 to 1991 Persian Gulf War (Operation Desert Storm) Period: 1990 to 2008 1990s-21st Century 1991 Fall of the USSR Jan 1, 1994 NAFTA creates free trade between Canada, Mexico and the United States 2001 USA PATRIOT Act Sep 11, 2001 Attack on the World Trade Center Aug 23, 2005 Hurricane Katrina