Fort Union Trading Post National Historic Site
This fort was the most important fur trading post on the upper Missouri for 39 years (1828-1867) – longer than any other post on the frontier. Fort Union is renowned as a center of peaceful economic and social exchange between Plains Indians and white cultures. Here, the Assiniboine and six other Northern Plains Indian Tribes exchanged buffalo robes and smaller furs for goods from around the world, including cloth, guns, blankets and beads. A bastion of peaceful coexistence, the post annually traded over 25,000 buffalo robes and $100,000 in merchandise. The fort that you see today is a full-scale reconstruction built on the exact locations of the original structures.