Career
While residing at Fort Hall, Jason Lee was greeted by Piupiumaksmaks who presented the missionary with two horses after a test of his medical skills. Late in 1844 Yellow Serpent organised the first Walla Walla expedition, with around 40 Walla Walla, Nez Perce and Cayuse men in addition to their families, reached New Helvetia to trade for cattle. After capturing horses that had been previously stolen an altercation arose with one of Sutter"s employees, ending with the death of Toayahnu.
Isaac Stevens met Piupiumaksmaks while headed east to chart a path for a Pacific railway in 1853, finding the chief to have a "dignified manner".
Piupiumaksmaks then owned "over 2,000 horses, besides many cattle" and maintained a farm outside Fort Nez Percéson Despite fears by Sacramento settlers of an invasion force of a thousand Walla Wallas in early 1846, Piupiumaksmaks returned with only 40 warriors and declared peaceable intentions.
While discussing with Joseph Warren Revere, who was engaged commanding volunteers at New Helvetia, Yellow Serpent stated:
The returning party contained those infected with measles, which eventually began to spread across the Columbia Plateau. The outbreak of the disease amongst the Cayuse was a major contributory factor that led to the Whitman Massacre.
Piupiumaksmaks was present during the 1855 treaty council of the Yakima War period.
As the war commenced, Piupiumaksmaks had his village near the mouth of the Touchet River. With the advance of an American military unit, he presented himself as a hostage and insisted an end to the conflict. During the first day of the Battle of Walla Walla, on December 7, Piupiumaksmaks was killed by the Oregon Volunteers who were holding him.
Soon afterwards he was decapitated and scalped by one of the Volunteers.