US History: 1877-2008 By Jesse.Peterson Period: Jul 4, 1776 to Jan 1, 1860 Early American History(1776-1860) Period: Jan 1, 1860 to Jan 1, 1877 Civil War/Reconstruction(1860-1877) Period: Jan 1, 1877 to Jan 1, 1900 The Gilded Age (1877-1900) Period: Jan 1, 1890 to Jan 1, 1920 The Progressive Era (1890-1920) Period: Jan 1, 1898 to Jan 1, 1910 Imperialism (1898-1910) Period: Jan 1, 1914 to Jan 1, 1918 World War I (1914-1918) Period: Jan 1, 1920 to Jan 1, 1929 Roaring Twenties (1920-1929) Period: Jan 1, 1929 to Jan 1, 1939 Great Depression (1929-1939)