U.S.History:1887-2008 By Xavier.rice Period: 1776 to 1860 Early American History Jun 4, 1776 Declaration of Independence signed. Sep 17, 1787 Constitution Written Dec 15, 1791 Bills of Rights Ratified. Period: 1860 to 1877 Civil War/Reconstruction 1864 13th Amendment Abolish slavery 1869 Transcontinental Railroad Completed 1876 Telephone invented by Alexander Graham Bell Period: 1877 to 1900 The Gilded Age Rockefeller/Carnegie (Captains of Industry vs. Robber Barons) Philanthropy Monopoly Jane Addams Laissez-Faire Period: 1890 to 1920 The Progressive Era Period: 1898 to 1910 Imperialism Period: 1914 to 1918 World War 1 Period: 1920 to 1929 Roaring Twenties Period: 1929 to 1939 Great Depression Period: 1939 to 1945 World War 2 Period: 1945 to 1960 Early Cold War Period: 1950 to 1970 Civil Rights Era Period: 1954 to 1976 Vietnam War Period: 1970 to 1991 End Of The Cold War Period: 1990 to 2008 1990s-21st Century