For 157 years, a Colorado governor’s order to kill Native Americans remained on the books. Not anymore.

Then, just after dawn on Nov. 29, 1864, Col. John Chivington led the 3rd Colorado Cavalry — some 675 troops — around a prairie bend, bringing multiple Cheyenne and Arapaho camps into view. Several chiefs went out to meet the oncoming horde. One of them, …Then, just after dawn on Nov. 29, 1864, Col. John Chivington led the 3rd Colorado Cavalry — some 675 troops — around a prairie bend, bringing multiple Cheyenne and Arapaho camps into view. Several chiefs went out to meet the oncoming horde. One of them, …