The Treaty of Fort Wise of 1861 was a treaty signed between the United States and six chiefs of the Southern Cheyenne and four of the Southern Arapaho Indian tribes. Many Cheyenne people hated this treaty because only a minority of Cheyenne chiefs had signed. They were also angry because those chiefs signed asking the rest of the tribe what they wanted. Different responses to the treaty were a reason why there was conflict between whites and Indians. This lead to the Colorado War of 1864, including the Sand Creek Massacre.