Discovery and Colonization: 1400s-1760s
Revolution and Independence: 1760s-1800
Federalism and the Antebellum Period: 1800-1860
Civil War: 1861-1865
Reconstruction and Industrialization: 1865-1900s
World War 1 and the Roaring Twenties: 1914-1929
Great Depression and World War 2: 1929-1945
Cold War and the Post-War Era: 1945-1990
Globalization and Beyond: 1990- Present
