Why did the U.S. military build frontier forts such as Fort Leavenworth?

(2 points)
Responses

to provide gainful employment for the many eastern settlers and immigrants who were moving westward
to provide gainful employment for the many eastern settlers and immigrants who were moving westward

to send a message to the Indian tribes that the U.S. owned and controlled the frontier
to send a message to the Indian tribes that the U.S. owned and controlled the frontier

to help squatters gain possession of lands in Indian territory
to help squatters gain possession of lands in Indian territory

to discourage fur trade and travel along the Missouri River

1 answer

to discourage fur trade and travel along the Missouri River