From the introduction:
After Mexico gained independence from Spain in 1821, it encouraged American settlers to migrate to the northern territory of Texas. However, as the number of settlers increased, tensions rose due to cultural and political differences. The situation worsened when President Antonio López de Santa Anna abolished the Mexico’s 1824 Constitution and assumed dictatorial powers. His actions fueled resentment among the Texians, leading to calls for Texan independence. In 1835, open rebellion broke out. By February 1836, as Santa Anna marched north with a large force to crush the rebellion, a small, diverse group of Texian and Tejano defenders gathered at the Alamo, a former mission, setting the stage for the legendary siege and battle that would profoundly shape Texan identity and the quest for independence.