sentences:  The San Poil Tribe was incorporated into the Colville Confederation by Executive Order from the President of the United States after strong recommendation from the Indian agents noting the San Poil's relatively peaceful nature toward others (especially European settlers).The Sanpoil are considered Interior Salish Native Americans, a designation that also includes the Okanagan, Sinixt, Lakes, Wenatchee, Nespelem, Spokan, Kalispel, Pend d'Oreilles, Coeur d'Alene, and Flathead peoples.Ross classifies Nespelem as one of the Okanagan tribes, while Winans classifies them as part of the Sanpoil.