By the time of the Great Sioux War of 1876-77, this fifty-five-year-old headman was leader of a small Miniconjou band that chose to remain away from the Cheyenne River Agency. Black Moon is listed as one of the Miniconjou leaders who had joined the northern village by the early summer of 1876 and was present at the Battle of the Little Bighorn. He and his family fled to Canada in 1877, joining Sitting Bull near Wood Mountain.