The Treaty of Fort Wise was an agreement between the US government and the Cheyenne and Arapaho people who lived on the western Great Plains in present-day Colorado, Kansas, Nebraska, and Wyoming. The treaty was signed in 1861 and reduced the territorial…

The Upper Arkansas Indian Agency was established in 1855 at Bent’s New Fort to service tribes along the upper part of the Arkansas River in eastern Colorado and western Kansas. It was also known as the Big Timbers Agency for the extensive stands of…