U.S. History : 1877-2008 By Carson.Love 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