U.S History:1877-2008 By aleina.tupou 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 World War 1 Period: 1920 to 1929 Roaring twenties Period: 1929 to 1939 Great depression Period: 1939 to 1945 world war 2 Period: 1950 to 1970 Civil rights era Period: 1954 to 1976 Vietnam war Period: 1970 to 1991 End of cold war Period: 1990 to 2008 1920s-21st century