late edit: DISCLAIMER: The pictured map is not actually a representation of the territories before colonisation. It's a hypothetical map of what countries there might have been had the continent not been colonised, thus all the names and borders are fictional and have never existed.
For good actual maps, check out native-land.ca.
Choctaw nation would like a word
That was one of two that jumped out as absent for me. Seminole was the other.
Seriously!!! Ironic that a map in this context erases one of the major nations in the South East.