Question: What tribe what American Horse a part of?
Sentence (from "John Wallace Crawford"): His daring ride of 350 miles in six days to carry dispatches to Fort Laramie for the "New York Herald", to tell the news of the great victory by Gen. George Crook against the village of Chief American Horse at the Battle of Slim Buttes during the Great Sioux War of 1876-1877, made him a national celebrity.
Relevant evidence: Yes