Pre-European Contact
Prehistory – 1673
European Exploration and Settlement
1674 – 1803
Territorial Period
1804 – 1821
Antebellum Period
1822 – 1860
Civil War and Reconstruction
1861 – 1877
Gilded Age and Progressive Era
1878 – 1913
World Wars Era
1914 – 1945
Cold War Era
1946 – 1991
Modern Era
1991 – Present