Westward expansion displaced many Native American tribes from their ancestral lands in the mid-19th century. This was justified under the guise of manifest destiny and bringing civilization to untouched lands, though in reality many of the removed tribes like the Cherokee had become relatively civilized. The Texas Rangers helped enable settlers' movement west by patrolling the frontier and increasing conflicts between settlers and Native Americans. Texas established reservations for displaced tribes but conflicts with Comanches led to their removal from Texas by the late 1850s.