Why did the victory at San Jacinto end the war (and other Texas History questions)?

Because Sam Houston attacked at night while the mexican soldiers were asleep and captured santa anna. Sam Houston retreated before the battle because his army wasn't ready to fight. Davy Crodkett, William B. Travis, James fannin, and James Bowie all fought at the alamo.Texan soldiers knew the land and fought for their rights since they were not part of U.S.A. Mexican soldiers just fought out of greed and revenge.