What significant event occurred in the 1740s regarding the Comanche in Texas?

The 1740s mark a pivotal period for the Comanche in Texas, notably with their first documented presence in the region. This event is significant because it represents the Comanche's expansion and their increasing influence in the area. The Comanche, who had migrated into the Southern Plains from the Rocky Mountains, were becoming more prominent in Texas due to their strong equestrian culture and extensive mobility.

During this time, the Comanche began establishing a presence that would impact trade, warfare, and alliances with other groups, including both Native American tribes and European settlers. Their strategic movements into Texas are well-documented in historical accounts, which indicate how their presence began to shape the political and social landscape.

The other choices do not accurately reflect the circumstances of the 1740s. The Comanche did not establish permanent settlements until later, there was no formal peace treaty with the Spanish at that time, and any alliance with the Apache against the Spanish would have occurred in a different context and period. The importance of recognizing the Comanche's documented presence lies in understanding their role in Texas history, which set the stage for future interactions and conflicts in the region.