What generally doesn't happen on Thanksgiving is thinking seriously about the people who were here before the Europeans landed. There are more than 500 federally recognized Native American Nations within the boundaries of the U.S. An honest map of the U.S. would show lots of spots that are not actually part of the U.S. because they are tribal lands.
The Native American Constitution and Law Digitization Project contains tribal constitutions and codes. As the web site says:
The University of Oklahoma Law Center Library and the National Indian Law Library work with tribes whose government documents appear on this web site; these tribal documents are either placed online with the permission of the tribes, or they are U.S. Government documents, rightfully in the public domain.If you're wondering about the First People among us and their laws (including information on land rights), this is a great place to start.