Fort Sarpy

Fort Sarpy tells the story of the American Fur Company's most dangerous post. The fort was built on the Yellowstone River in 1850 for the trade with the Crow. At this time, the tribe was located in a triangle between the Tongue and the Bighorn River, with its northern boundary the Musselshell River. In 1850, the Crow were a small tribe, at one time combined with the Gros Ventre before they split off in the 1700's. They'd been hit hard by the smallpox epidemic in the 1830's. Because of stron...