Articles

ERA 4: Expansion and Reform (1801-1861)
ERA 4: Expansion and Reform (1801-1861)
ERA 4: Expansion and Reform (1801-1861)
ERA 4: Expansion and Reform (1801-1861)
ERA 4: Expansion and Reform (1801-1861)
ERA 4: Expansion and Reform (1801-1861)
ERA 4: Expansion and Reform (1801-1861)
ERA 4: Expansion and Reform (1801-1861)
ERA 4: Expansion and Reform (1801-1861)
ERA 4: Expansion and Reform (1801-1861)
ERA 4: Expansion and Reform (1801-1861)
ERA 4: Expansion and Reform (1801-1861)
ERA 4: Expansion and Reform (1801-1861)

Historical Documents

The Louisiana Purchase
ERA 4: Expansion and Reform (1801-1861)
ERA 4: Expansion and Reform (1801-1861)
Map of North America before the Mexican-American War
ERA 3: Revolution and the New Nation (1754–1820s), ERA 4: Expansion and Reform (1801-1861)
ERA 4: Expansion and Reform (1801-1861)
ERA 4: Expansion and Reform (1801-1861)
This map shows the land acquired through the Gadsden Purchase Treaty
ERA 4: Expansion and Reform (1801-1861), ERA 5: Civil War and Reconstruction (1850-1877)
Article
ERA 4: Expansion and Reform (1801-1861), ERA 6: The Development of the Industrial United States (1870-1900)
Frederick J. Turner
ERA 4: Expansion and Reform (1801-1861)
A Gold Hunter's Experience
ERA 4: Expansion and Reform (1801-1861), ERA 5: Civil War and Reconstruction (1850-1877), ERA 6: The Development of the Industrial United States (1870-1900)
Caroline Churchill
ERA 3: Revolution and the New Nation (1754–1820s), ERA 4: Expansion and Reform (1801-1861), ERA 5: Civil War and Reconstruction (1850-1877), ERA 6: The Development of the Industrial United States (1870-1900)
ERA 4: Expansion and Reform (1801-1861)
ERA 4: Expansion and Reform (1801-1861)

Historical Images

Map
ERA 3: Revolution and the New Nation (1754–1820s), ERA 4: Expansion and Reform (1801-1861), ERA 5: Civil War and Reconstruction (1850-1877), ERA 6: The Development of the Industrial United States (1870-1900), Multiple Eras

Collections

Washington Crossing the Delaware by Emanuel Leutze
ERA 4: Expansion and Reform (1801-1861), ERA 7: The Emergence of Modern America (1890–1930)
Daniel Boone Escorting the American Settlers Through the Cumberland Gap by George Caleb Bingham
ERA 4: Expansion and Reform (1801-1861)