On February 23, 1836, the first cannonballs struck the walls of the Alamo, a sound that signaled the beginning of a 13-day siege that would come to define the Texas Revolution. Inside the fort, approximately 170 Texan defenders braced for a fight they knew they could not win, outnumbered roughly ten to one by the Mexican army. From their positions, the Texans could see a red flag flying above the Mexican forces—a sign that no prisoners would be taken. The men inside the Alamo were not just fighting for survival; they were fighting a revolt against Mexican President Antonio López de Santa Anna, who and declared himself dictator the year before, prompting Texas to rise up in rebellion.
Santa Anna quickly assembled an army to crush the uprising, and his first major confrontation with the rebels came at the Alamo, a former religious mission that had been converted into a makeshift fort. Among the defenders were some of the most legendary figures in American frontier history, including Davy Crockett, the former Tennessee congressman and celebrated hunter known as the King of the Wild West, and Jim Bowie, a folk hero famous for the knife that bore his name. Bowie, a former slave smuggler, was the commander of the defenders, but on the second day of the siege, he fell ill and handed command over to William Travis, a young lieutenant colonel who quickly grasped the dire situation the Texans were in
Travis wrote an open letter calling for volunteers to join the fight for Texas independence, a plea that would later become known as the “Victory or Death” letter. The letter has since remained a cornerstone of historical education for Texas schoolchildren, symbolizing the desperate stakes of the conflict.
In the early days of the siege, however, the Mexican cannons were positioned too far away to do much damage to the Alamo’s walls, leading Santa Anna to order about 200 soldiers to seize nearby shacks closer to the fort, a move that would have allowed the Mexicans to position their artillery much more effectively
The Texans opened fire on the Mexican soldiers as soon as they approached, sparking a brief skirmish. After intense fighting, the Texans drove the Mexicans back. That night, the defenders crept out of the fort and set the shacks ablaze to keep them out of enemy hands. A few days later, Travis’s call for reinforcements was answered by 32 men who arrived to join the defenders, though they were briefly mistaken for Mexican soldiers and fired upon before their true identity became clear
As the siege dragged on with no breakthrough, Santa Anna concluded that his only path to victory was to overwhelm the walls through sheer numbers.
On March 5, twelve days after the siege began, the Mexican cannons fell silent. The weary Texans, exhausted after nearly two weeks of constant vigilance, finally succumbed to sleep—just as Santa Anna had anticipated. While the defenders rested, the Mexicans prepared for a full-scale assault, organizing their forces into four columns assigned to attack different sections of the walls: 350 men against the northwest corner, 400 against the north wall, another 400 against the east wall, and 125 against the south
At 6:00 a. m.
, the Texans were jolted awake by the shouts of “Viva Santa Anna” and the sound of Mexican bugles. The Mexican advance quickly ran into trouble, as their column formation meant that only the frontline soldiers could fire, making them easy targets for Texan artillery. The ideal weapon for the defenders would have been canister shot—a type of ammunition that turns a cannon into a massive shotgun, firing multiple small lead balls at once. Lacking such munitions, the Texans loaded their cannons with whatever metal objects they could find: door hinges, nails, and pieces of cut-up horseshoes
This improvised ammunition proved somewhat effective against the advancing Mexican ranks.
One Mexican commander later reported that a single volley killed half a company of soldiers. The Mexicans attempted to storm the walls twice, but both efforts were beaten back. Eventually, the Mexican columns from the east and west were redirected northward, concentrating nearly all of their forces against the north wall. Despite suffering heavy casualties, the Mexicans pressed forward and reached the base of the walls.
The walls themselves were not particularly tall—less than four meters—allowing the attackers to scale them with their bare hands
The Texans could not fire fast enough to hold back the wave of soldiers, and the Mexicans eventually captured the north wall. The surviving defenders retreated into the rooms inside the Alamo, firing from windows and openings as the Mexicans advanced room by room, blasting doors down with cannon fire before charging into hand-to-hand combat. The last Texans to fall were the ones manning the cannons. The Mexican troops, following their orders to take no prisoners, executed any Texans who surrendered, though they spared some non-combatants, including women and children
For nearly an hour after the fighting subsided, Mexican soldiers searched the bodies of the fallen Texans, stabbing anyone who showed signs of life.
The Mexicans had won the battle and captured the Alamo, but their brutality had the opposite effect of what they intended. The slaughter only hardened Texas’s resolve to achieve independence. “Remember the Alamo” became a rallying cry for the independence movement, and the following month, the Texans caught the Mexican forces off guard at the Battle of San Jacinto. Santa Anna himself was captured and forced to withdraw his troops from Texas.
Texas had secured its independence, and the Lone Star State had come into existence