Leading his army north, Santa Anna and his 3,000 man army laid siege to the Alamo, a military fort in San Antonio on February 23, 1836. For 13 days, Santa Anna would bombard the fort with cannon fire. Inside, the Texan forces were led by Colonel William Travis, famous knife fighter David Bowie, and newly arrived Tennesseean and frontier icon Davy Crockett. In the early hours of March 6, the Mexican army attacked on all sides. Within an hour, the Americans were overrun and the siege came to an end. No Americans survived, with deaths numbered at around 180. The defeat at the Alamo would leave Santa Anna free to move east and pursue Sam Houston and his army.