Oceti Sakowin Mandan https://en.wikipedia.org/wiki/Mandan https://www.wikidata.org/wiki/Q510048 A Native American tribe of the Great Plains who have lived for centuries primarily in what is now North Dakota. They are enrolled in the Three Affiliated Tribes of the Fort Berthold Reservation. About half of the Mandan still reside in the area of the reservation; the rest reside around the United States and in Canada.