U.S History: 1887-2008 By Tyler.jefferson Period: 1776 to 1860 Early American History Period: 1860 to 1877 Civil War/reconstruction Period: 1877 to 1900 The Gilded Age Period: 1898 to 1910 Imperialism Period: 1914 to 1918 World War 1 Period: 1920 to 1929 Roaring Twenties Period: 1939 to 1945 World war ll 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 1900s- 21st century