Final answer:
Assimilation was used in the Oregon Territory to enforce cultural suppression, displace indigenous peoples, and impose Western education and religious beliefs.
Step-by-step explanation:
Assimilation was used as a Process of Elimination Technique in the Oregon Territory to enforce cultural suppression, displace indigenous peoples from their ancestral lands, and impose Western education and religious beliefs. Cultural suppression involved eradicating native languages and traditions, forcing Native American children to abandon their tribal traditions and embrace Euro-American practices in boarding schools. Assimilation also led to the displacement of indigenous peoples from their ancestral lands, as settlers sought to eliminate tribes from the lands they desired. Additionally, assimilation resulted in the imposition of Western education and religious beliefs on Native Americans.