what formidable opponent does buck track and how does buck's hunt end

The Yeehats are gleefully dancing Three miles out he sees a fresh trail, and he becomes more cautious. Suddenly he comes across the body of Nig, an arrow sticking from his head. He passes another dog almost dead, and then he passes the body of Hans. He sees Yeehat indians dancing around around the wreckage of the camp.

Buck leaps at the indians, ripping open the throat of the chief, and keeps killing until the rest of the tribe runs away in terror.