Travis directed the preparation of San Antonio de Valero Mission, known as the Alamo, for the anticipated arrival of Santa Anna and the main command of the Mexican army. With engineer Green B. Jameson, Travis strengthened the walls, constructed palisades to fill gaps, mounted cannons, and stored provisions inside the fortress.
Travis also wrote letters to officials requesting reinforcements, but only the thirty-five men came from Gonzales to his relief, thus raising the number of the Alamo's defenders to approximately 183. Travis's letter addressed "To the People of Texas and All Americans in the World," written on February 24, two days after Santa Anna's advance arrived in San Antonio, brought more than enough help to Texas from the United States, but it did not arrive in time. When Santa Anna had his forces ready, he ordered an assault on the Alamo. This occurred just before dawn on March 6, 1836. The Mexicans overpowered the Texans within a few hours. Travis died early in the battle from a single bullet in the head. His body and those of the other defenders were burned. The nature of Travis's death elevated him from a mere commander of an obscure garrison to a genuine hero of Texas and American history. http://www.tshaonline.org/handbook/online/articles/ftr03