The primary group that was instrumental in strengthening and saving American claims to Oregon were <u>American missionaries to the Indians.</u>
<u>Explanation:</u>
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.
Exodus is the second book
The Great Migration/ The North Migration. The time period was fro 1916 to (I believe) 1970. During this time people migrated from the South to the North because they had so many more opporunities compared to in the South since they had actual factories there.
The three-fifths compromise was when the Northern and Southern states decided to make an enslaved person count as 3/5 of a person for taxation and representation. This shows back then that Americans viewed slaves as property and didn't want them to count as a real person.
I think a messanger but I'm not to sure