Question: Which states are consistently included in the region where the Cayuse War took place?
Sentence (from "Cayuse War"): Caused in part by the influx of disease and settlers to the region, the immediate start of the conflict occurred in 1847 when the Whitman Massacre took place at the Whitman Mission near present day Walla Walla, Washington when fourteen people were killed in and around the mission.
Relevant evidence: No