The siege of the Alamo was the first thirteen days of the Battle of the Alamo. On February 23, Mexican troops under General Antonio Lopez de Santa Anna entered San Antonio de Bexar, Texas, and surrounded the Alamo Mission. The Alamo was defended by a small force of Texians and Tejanos, led by William Barrett Travis and James Bowie, and included Davy Crockett. Before beginning his assault on the Alamo, Santa Anna offered them one last chance to surrender.