From Wikipedia ...
Ollokot was the son of Tuekakas or Old Joseph and the younger brother of Chief Joseph. His father and brother were advocates of peace and passive resistance to encroachments by White settlers and miners on the land of the Nez Perce. Ollokot, described as tall, graceful, intelligent, fun-loving and daring, was a hunter and warrior but also experienced in diplomacy, accompanying his father and older brother to treaty negotiations between the U.S. and Nez Perce in 1855 and 1863.
Although Joseph and Ollokot acceded to Howard’s demand that the Nez Perce relocate to the reservation, a handful of Nez Perce warriors, outraged by abuses they had suffered, precipitated the war by attacking and killing 18 White settlers in June 1877. General Howard sent out two companies of cavalry to punish the Nez Perce, but at the Battle of White Bird Canyon on 17 June, 70 Nez Perce, led by Ollokot, decisively defeated a larger force of soldiers and civilian volunteers.