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).