Former Indian reservations in Oklahoma are the Indian reservations in the lands that are now the state of Oklahoma. Prior to statehood, both Oklahoma Territory and Indian Territory contained suzerain Indian nations that had legally established boundaries. The US Federal government broke up collective tribal landholdings through the allotment process before the establishment of Oklahoma as a state in 1907. Instead of reservations, Oklahoma Indian tribes have tribal jurisdictional areas, with Osage Nation being the one exception. As confirmed by the Osage Nation Reaffirmation Act of 2004, the Osage Nation retains mineral rights to their reservation, the so-called "Underground Reservation".