University of Oregon
Mapping History Project: Territorial Expansion of the u.s. 1783 1853
Click on the sliding bar and watch how the United States territory grew with the Louisiana Purchase, Florida Acquisitions, Texas Annexation, Oregon Country, and Mexican Cession.
Annenberg Foundation
Annenberg Learner: United States History Map: The Nation Expands
After examining a map showing the expansion of the United States, click to read about each addition to the country and see where that addition is. Play Expansion Concentration to test your skills.