Eastern New Mexico

Comancheria (, 'Comanche land'; ), also known as the Comanche Empire, was a large country covering modern New Mexico, West Texas, and nearby areas that was occupied by the Comanche before the 1860s. The historian Pekka Hämäläinen has argued that Comancheria formed an empire at its peak, and that view has been echoed by other historians.

Apachería was the term used to designate the region of the various Apache countries. The earliest written records have it as a region extending from north of the Arkansas River into what are now the northern states of Mexico and from Central Texas through New Mexico to Central Arizona.