Texas History Timeline By kelseybarba Mar 2, 1836 Texas Declares Independence Mar 6, 1836 Battle of the Alamo Santa Anna was defeated on his attack on the Alamo. Apr 21, 1836 The Battle of San Jacinto Houston ordered the attack on the Mexican army. Santa Anna was captured after the battle and so began the Republic of Texas. Jan 1, 1839 Austin becomes Capital of Texas