The primary group that was instrumental in strengthening and saving American claims to Oregon were American missionaries to the Indians.
Explanation:
The Oregon evangelists were pioneers who settled in the Oregon Country of North America beginning during the 1830s committed to carrying Christianity to nearby Native Americans. In 1834 Jason Lee and four partners joined the Wyeth Expedition and set out toward the Northwest.
Lee chose a site in the Willamette Valley, and a strategic built up near present-day Salem, Oregon. The Wyeth-Lee gathering was the primary gathering to venture to every part of the whole course of what was to turn into the Oregon Trail. They additionally gave care and supplies to wagon parties going along the Oregon Trail.
