Historical eras in US History By StevennGuerrero Period: Jan 1, 1877 to Dec 31, 1900 The gilded age Post Reconstruction Period: Jan 1, 1898 to Dec 31, 1919 Age of imperialism and reform Period: Jan 1, 1914 to Dec 31, 1918 World War I Period: Jan 1, 1920 to Dec 31, 1929 The Roaring 20s Period: Jan 1, 1930 to Dec 31, 1939 The great depresion Period: Jan 1, 1930 to Dec 31, 1949 Rise of dictators and World War II Period: Jan 1, 1950 to Dec 31, 1960 Civil Rights Period: Jan 1, 1980 to Dec 31, 1989 Cold war Period: Jan 1, 1980 to Dec 31, 2000 Late 20th Period: Jan 1, 2001 to Dec 31, 2008 21 Century