The
Unassigned Lands in
Oklahoma were in the center of the lands ceded to the
United States by the
Creek (Muskogee) and
Seminole Indians following the
Civil War and on which no other tribes had been settled. By 1883 it was bounded by the
Cherokee Outlet on the north, several relocated Indian reservations on the east, the
Chickasaw lands on the south, and the
Cheyenne-
Arapaho reserve on the west. The area amounted to 1,887,796.47 acres (2,949 miles² or 7,640 km²).