Colorado territorial officials pressured federal authorities to redefine the extent of Indians treaty lands, and in the fall of 1860 A.B. Greenwood, Commissioner of Indian Affairs, arrived at Bent's New Fort along the Arkansas River to negotiate a new treaty.
The situation involved Colorado territorial officials attempting to redefine the boundaries of land designated for Native Americans, leading A.B. Greenwood, Commissioner of Indian Affairs, to travel to Bent's New Fort on the Arkansas River in the fall of 1860 to negotiate a new treaty.