summer school us history By KDestin Period: 1760 to 1820 Imperialism Period: 1860 to 1900 Gilded aged Period: 1890 to 1920 Progressive era 1920 roaring 20s 1930 Great depression 1939 world war II 1945 cold war 1954 Civil rights movement Jan 1, 1970 1970s Jan 1, 1980 1980s 1990 Post cold war 1994 World war 1