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 "Arapaho"): The Arapaho language, "Heenetiit", is an Algonquian language closely related to Gros Ventre (Ahe/A'ananin), whose people are considered to have separated from the Arapaho at an early time.
Relevant evidence: No