Established in 1718 as Mission San Antonio de Valero, for over 300 years, the former mission now known as the Alamo has been a crossroads of history. Having existed under six flags of independent nations and served as a garrison for five different armies, the Alamo has a rich history and a heritage to inspire all Texans. Although the site is best known as the site of the 1836 Battle of the Alamo, all 300 years of Alamo history are vital to our story.