Fort Berthold
From Warlike
Fort Berthold was the name of two successive forts on the upper Missouri River in present-day central-northwest North Dakota. Both were initially established as fur trading posts. The second was adapted as a post for the U.S. Army. After the Army left the area, having subdued Native Americans, the fort was used by the US as the Indian Agency for the regional Arikara, Hidatsa, and Mandan Affiliated Tribes and their reservation.