The correct answer to this open question is the following.
Sam Houston brought in the Texas Rangers and militias to help reduce the number of Native American raids and protect settlers.
That was the best decision that he could make before the constant raids and attacks of the Native American Indian tribes in the region. Sam Houston relied on the Texas Rangers and militias to protect the settlements, the people, and the property in Central Texas.
Indians used to steal and attack white settlers in Texas, that is why he ordered Rangers to attack aggressive Indians such as Caddos, Tehuacanas, Sabine, Pawnees, and Comanches. They stole horses and hurt white people.
