There was a process proposed by Russell Means for the legal deconstruction of the US as a colonial construct. It would begin with the Oceti Sakowin asking for and receiving international recognition for formal treaty termination. This was why I studied international law two decades ago.

Aha! That's awesome! I hope to see it happen. For those unaware (as I did not recognize the term Oceti Sakowin): americanindian.si.edu/nk360/plains...