Maps: January 2010 Archives
Territorial evolution of the United States - Wikipedia, the free encyclopedia
Step-by-step chronological account of the development of US international and interstate boundaries, the creation of territories, and the settlement of disputes -- not only what boundaries changed, but why, with links to further information. A good example of what Wikipedia does best.
Map shows boundaries of tribes and territories in 1889, with colored outlines and numbers to indicate areas that were ceded back by the tribes to the Federal government following the Civil War.