Why did SFA need to form a militia in his first colony in Texas?

Stephen F. Austin (SFA) needed to form a militia in his first colony in Texas primarily for protection against potential threats from Native American tribes and to maintain order among the settlers. The region was still relatively unsettled and posed security challenges, prompting the need for a local defense force. Additionally, the militia helped to establish a sense of governance and community among the colonists, fostering cooperation and resilience in the face of external pressures.