What happened at the peace meeting between Texans and Comanche Indians in March 1840?

Comanche leaders and warriors, as well as some five women and children of the tribe, were killed by Texas troops at San Antonio on March 19, 1840. The event is said to have hardened Comanche hostility to whites in Texas.

Explanation:

For more than a century Comanches had commanded the high plain of the central and western Texas and wages continuous warfare against the white encroachment. The Comanches in the early 1840 a band of Comanches traveled to San Antonio to negotiate a peace settlement and and to return the white people held captive with the commissioner of the Texas government. But things didn't went as planned and they had a fight with the solders of Texas.