Final answer:
White settlers moving illegally onto Yakama lands was a cause of the Yakama War.
Step-by-step explanation:
One cause of the Yakama War was the illegal settlement of White settlers on Yakama lands. This can be supported by the reasons settlers moved onto Yakama lands, the US government's responses to the illegal settlement, and the description of the lands claimed by the US government in Yakama territory. The settlers moved onto Yakama lands because of the desire for land, resources, and opportunities, while the US government often turned a blind eye to the illegal actions or even supported the settlers. Additionally, the US government claimed vast territories in Yakama territory, further encroaching on Yakama lands.
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