U.S. History: 1877-2008 By jacob.brasher Period: 1776 to 1860 Early American History Jul 4, 1776 Declaration of Independence signed Sep 17, 1787 Constitution was written Dec 15, 1791 Bill of Rights ratified Period: 1860 to 1877 Civil War/Reconstruction 1862 Homestead Act Jan 31, 1865 13th Amendment Jun 8, 1866 14th Amendment 1869 Transcontinental Railroad Completed 1870 15th Amendment 1876 Telephone Invented by A.G.Bell Period: 1877 to 1900 The Gilded Age 1890 Sherman Antitrust act Period: 1890 to 1920 The Progressive Era May 18, 1896 Plessy v Ferguson Period: 1898 to 1910 Imperialism Period: 1914 to 1918 World War I Period: 1920 to 1929 Roaring Twenties 1929 Stock Market Crash Period: 1929 to 1939 Great Depression 1932 Roosevelt Elected 1935 WPA made 1939 Hitler invades Poland Period: 1939 to 1945 World War II 1941 Pearl Harbor 1942 Battle of Midway 1944 D-Day Period: 1945 to 1960 Early Cold War Containment Arms Race/Space Race The Union of Soviet Socialist Republics Communism Domino Theory 1947 Truman Doctrine 1947 Truman Doctrine 1948 Berlin Airlift 1948 Marshall Plan 1949 NATO established 1950 Korean War Period: 1950 to 1970 Civil Rights Era 1951 Rosenberg Trials 1952 First H-Bomb developed by US Period: 1954 to 1976 Vietnam War 1955 Jonas Salk Invents polio vaccine 1957 USSR launches sputnik Period: 1970 to 1991 End of the Cold War Period: 1990 to 2008 1990s-21st Century