Fort Buford State Historic Site - Credit: Wikimedia Commons
Fort Buford was a United States Army Post at the confluence of the Missouri and Yellowstone rivers in Dakota Territory, present day North Dakota, and the site of Sitting Bull's surrender in 1881.Ewers, John C. (1988): "When Sitting Bull Surrendered His Winchester". Indian Life on the Upper Missouri. Norman and London. Pp. 175-181. Read more on Wikipedia
Source: en.wikipedia.org