Alamo Day is observed annually on March 6 to commemorate the conclusion of the Battle of the Alamo, a significant event in the Texas Revolution. The battle, which lasted for 13 days, ended in 1836 when Mexican soldiers, led by General Antonio Lopez de Santa Anna, overran the fort, resulting in the deaths of nearly all Texan defenders, including notable figures like Davy Crockett. The day serves as a reminder of the sacrifices made during the siege and is marked by various events and activities that honor the legacy of those who fought. The Alamo, originally constructed as Mission San Antonio de Valero by Spanish settlers, has since become a national symbol of perseverance and resistance, attracting approximately 2.5 million visitors each year. Observances may include educational programs, reenactments, and memorial services to reflect on the historical significance of the battle and its impact on Texas history.