AlamoDuring the winter of 1835-1836, the people of Texas decided to sever their relations with Mexico because of dissatisfaction with the Mexican government. To prevent the success of this independence movement, General Antonio López de Santa Anna, in command of the Mexican Army, approached San Antonio with his troops. Lieutenant Colonel William Barret Travis and a force of about 150 Texans sought to defend the city. The company included the famous frontiersmen James Bowie and Davy Crockett. The quick arrival of the Mexicans surprised the Texans, who retreated to the Alamo. Over the following days, about 5,000 Mexican troops arrived in San Antonio. Travis sent out a plea for help, declaring, "I shall never surrender or retreat." A relief party from Gonzales, Texas, passed through the Mexican lines and entered the Alamo, increasing the Alamo forces to 189 men. Colonel J. W. Fannin left Goliad, Texas, with most of his 400 men to relieve the Alamo, but he had equipment trouble on the way and returned to Goliad.
The siege of the Alamo lasted 13 days. By March 5, the garrison could not return Mexican fire because ammunition was low. This convinced Santa Anna that the fort could be assaulted. Early the next morning, a Mexican force of about 1,500 soldiers stormed the Alamo and succeeded in scaling the walls. At the end, the Texans fought using their rifles as clubs. Some historians believe that a few defenders, perhaps including Crockett, survived the battle only to be executed at Santa Anna's orders. Other historians accept the more familiar story that all the Texans who fought died in the battle. At 8 a.m., the Mexican general reported his victory to his government. Survivors of the battle included Susanna Dickinson, the wife of an officer; her baby; her Mexican nurse; and Colonel Travis's black slave Joe.
"Remember the Alamo" became a battle cry. The determined defense of the Alamo gave General Sam Houston time to gather the forces he needed to save the independence movement of Texas. He retreated eastward, pursued by Santa Anna. At San Jacinto, Texas, he turned on the Mexicans, surprised them during an afternoon siesta, and on April 21, in just 18 minutes, captured or killed most of the Mexican army of over 1,200 men. Houston's army captured Santa Anna the following day and forced him to sign a treaty granting Texas its independence.