The word Oklahoma actually translates in the Choctaw language to “red-person,” specifically, ukla=person and huma=red, and the entire territory had initially been ‘given’ by the US government as a territory intended solely for the tribes… and it is where the tribes from the southeastern states were marched towards on the Trail of Tears.
This Memorial located directly upon the old Route 66 route marks one of the boundaries of “Indian Territory” a continually shrinking zone that the American government promised to leave to its native populations that at this point is more easily observable via the names of places than on the faces of its occupants.