There are two great resources that are constantly updated and both worth keeping up with.
1. This interactive map built by Claudio Saunt shows the dispossession of indigenous land from the late 1700’s to the late 1800’s. If you click on different parts of the map, a pop up will give you information and links to relevant treaties, laws, and executive orders that legalized the dispossession. Explore more here.
2. Another interactive map that shows relevant treaties, languages spoken, and territories. Explore more of this map here.