Answer:
However, they were vital in the process of settling the West, because they discovered the different trails west across the Plains, which were later followed by genuine settlers.
Step-by-step explanation:
Westward Expansion and the Mexican War Despite this sectional conflict, Americans kept on migrating West in the years after the Missouri Compromise was adopted. Thousands of people crossed the Rockies to the Oregon Territory, which belonged to Great Britain, and thousands more moved into the Mexican territories of California, New Mexico and Texas.