Treaty of Fort Wise

The Treaty of Fort Wise of 1861 was a treaty entered into between the United States and six chiefs of the Southern Cheyenne and four of the Southern Arapaho Indian tribes. A significant proportion of Cheyennes opposed this treaty on the grounds that only a minority of Cheyenne chiefs had signed, and without the consent or approval of the rest of the tribe. Different responses to the treaty became a source of conflict between whites and Indians, leading to the Colorado War of 1864, including the Sand Creek Massacre.

By the terms of the 1851 Treaty of Fort Laramie between the United States and various tribes including the Cheyenne and Arapaho, the Cheyenne and Arapaho were recognized to hold a vast territory encompassing the lands between the North Platte River and Arkansas River and eastward from the Rocky Mountains to western Kansas. This area included present-day southeastern Wyoming, southwestern Nebraska, most of eastern Colorado, and the westernmost portions of Kansas. However, the discovery in November 1858 of gold in the Rocky Mountains in Colorado (then part of the western Kansas Territory) brought on a gold rush and a consequent flood of white emigration across Cheyenne and Arapaho lands. 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.

On February 18, 1861, six chiefs of the Southern Cheyenne and four of the Arapaho signed the Treaty of Fort Wise with the United States, at Bent's Old Fort at Big Timbers near what is now Lamar, Colorado, recently leased by the U.S. Government and renamed Fort Wise, in which they ceded to the United States most of the lands designated to them by the Fort Laramie treaty. The Cheyenne chiefs were Black Kettle, White Antelope, Lean Bear, Little Wolf, Tall Bear, and Left Hand; the Arapaho chiefs were Little Raven, Storm, Shave-Head, and Big Mouth.

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