Question: What time period was the war that the tribe of Native Americans historically living on the plains of Colorado and Wyoming fought in against the United States?
Sentence (from "Red Cloud's War"): Red Cloud's War (also referred to as the Bozeman War or the Powder River War) was an armed conflict between the Lakota, Northern Cheyenne, and Northern Arapaho on one side and the United States in Wyoming and Montana territories from 1866 to 1868.
Relevant evidence: Yes