U.S. History 1887-2008 By Pjohnson16 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 era Period: 1914 to 1918 world war 2 Period: 1920 to 1929 roaring Twenties Period: 1929 to 1939 great depression Period: 1945 to 1960 early cold war Period: 1950 to 1970 civil war era Period: 1954 to 1976 vietnam war Period: 1970 to 1991 end of cold war Period: 1990 to 2008 1990-21st century