US National Archives
National Archives: Lewis and Clark's Expedition to the Complex West
Jefferson sent Lewis and Clark to explore the land annexed in the Louisiana Purchase knowing that his area was already inhabited and politically complicated. Students will explore documents related to the purchase and use the map to...
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.
University of Georgia
University of Georgia: Map of Southern u.s. (1806)
A detailed 1806 map of the southern U.S. States and Territories and Spanish Florida showing borders, rivers, mountains and overland trails.