U.S. History Timeline By Cameron Fay 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 II Period: 1945 to 1960 Early cold War Period: 1954 to 1976 Vietnam War Period: 1990 to 2008 1990s-21st Century