Fort Buford, North Dakota and has a great History. It was the site of Sitting Bull's surrender. The cancel is less than 1 month after his surrender on July 19th, 1881.
"Sitting Bull had his young son Crow Foot surrender his Winchester lever-action carbine to Major David H. Brotherton, commanding officer of Fort Buford in the parlor of the Commanding Officer's Quarters in a ceremony the next day. He told the 4 soldiers, 20 warriors and other guests in the small room, that he wished to regard the soldiers and the white race as friends but he wanted to know who would teach his son the new ways of the world. Two weeks later, after waiting in vain for other members of his tribe to follow him from Canada, the Army transferred Sitting Bull and his band to Fort Yates, the military post located adjacent to the Standing Rock Agency, which straddles the present-day boundary of North and South Dakota.
http://en.wikipedia.org/wiki/Fort_Buford