In Invasion of America, an animated map shows the loss of land.
Between 1776 and 1887, the United States seized over 1.5 billion acres from America’s indigenous people by treaty and executive order. The Invasion of America shows how by mapping every treaty and executive order during that period. It also contains present-day federal Indian reservations.
See how it happened in the video below.
There is also an interactive version that provides links to related treaties and events.