Decades: 1310s BC 1300s BC 1290s BC 1280s BC 1270s BC - 1260s BC - 1250s BC 1240s BC 1230s BC 1220s BC 1210s BC
Significant People
... Mountain Indian Reservation[?] Spirit Lake Indian Reservation[?] Standing Rock Indian Reservation[?] Cheyenne River Sioux Indian Reservation[?] Lake ...