Final answer:
General Sam Houston was in charge of the Texan Calvary at the Battle of San Jacinto.
Step-by-step explanation:
The Texan cavalry at the Battle of San Jacinto was led by General Sam Houston. In the battle, Houston's forces surprised the Mexican troops under the command of General Antonio Lopez de Santa Anna while they were napping, resulting in a quick victory for the Texans within 15 minutes. This decisive battle helped secure the independence of Texas from Mexico during the Texas Revolution.