The Invasion of America is an interactive map produced by eHistory.org for the purpose of showing how the land holdings of Native Americans drastically shrunk between 1784 and 1887. You can move the timeline at the bottom of the map to see how the land holdings changed from year to year or decade to decade. The map also includes tools for selecting a Native American nation and or selecting a specific state or territory. Clicking on a highlighted tract of land will open a menu that includes links to treaty or executive order through which the land changed ownership.
Applications for Education
The Invasion of America could be a good resource for teachers of United States History to use to show students the impact westward expansion and the idea of Manifest Destiny had on Native Americans. To extend the use of the map further you could have students investigate the treaties and or executive orders used in acquiring land.
H/T to Google Maps Mania.