Kawaiisu
The Kawaiisu Nation are a tribe of indigenous people of California in the United States.
The Kawaiisu Nation is the only treatied tribe in California, Ratified Treaty, 9 Stat. 984, Dec. 30, 1849. This Treaty with the Utah Confederation of tribal nations.
They have never given up their territorial rights to any of their ancestral land to the United States. The Kawaiisu Nation had preexisting treaties with Spain and those were recognized by Mexico until 1849 when California was becoming a State.