Timeline Era's By Darien.Willis 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 I Period: 1920 to 1929 Roaring Twenties Period: 1929 to 1939 Great depression Period: 1939 to 1945 World war II 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