Securing these animals became the chief incentive of war parties, which indicated a sign of wealth. The history of the Skidi does not differ materially from that of the other Pawnee tribes. They joined in the treaties with the United States, served as scouts in its army, and followed with the rest of the Pawnee to Oklahoma.

Skilloot - A Chinookan tribe found by Lewis and Clark in 1806 residing on both sides of Columbia River in Washington and Oregon, and numbering about 2,500 people. They were among the tribes almost exterminated by the fever epidemic of 1823. Later their principal village was Cooniac, at Oak Point, Washington. In 1850, they had been reduced to only about 200 and as an individual tribe, disappeared from history a few years later.
 

Sobaipuri - A Piman tribe, they formerly inhabiting the main and tributary valleys of San Pedro and Santa Cruz Rivers, as well as the Gila River between the month of the San Pedro River and the ruins of Casa Grande, and possibly eastward of this area in south Arizona. Missions were established among them by the Spaniards in the latter part of the 17th and beginning of the 18th centuries at Guevavi, Suamca, and San Xavier del Bac. They were said to have driven out of Aravypa Canyon by the Apace and were forced to flee to the Pima. The Apache also caused them to give up their homes on the San Pedro River and merge into the Papago tribe, who in later years at least one of the former Sobaipuri towns -- San Xavier del Bac.