This demonstrates just how much can be accomplished in just twenty minutes:

About 3:30 in the afternoon, during the Mexican siesta period, Houston distributed his troops in battle array, bracketing the line with the "Twin Sisters" cannon. Shielded by trees and a rise in the terrain, the Texans were able to advance with some security. Then with the cries "Remember the Alamo" and "Remember La Bahia" or "Remember Goliad" ringing along their lines, the Texans swooped down on the dismayed Mexican army, pursuing and butchering them long after the battle itself had ended.

630 Mexicans were killed and 730 taken prisoner. Texans lost only 9 killed or mortally wounded; thirty were less seriously wounded. Among the latter was General Houston, whose ankle was shattered.

Sam Houston is one of the most colorful men in the history of both the United States and Texas. I've read the James L. Haley biography on Houston, and highly recommend it.