Centralist Republic of Mexico
The 1830s for Mexico saw the end of the First Mexican Republic and saw General Santa Anna move in and out of the presidency in a 30-year span now known as the "Age of Santa Anna". In 1834, President Antonio López de Santa Anna dissolved Congress, forming a new government. That government instituted the Centralist Republic of Mexico by approving a new centralist constitution ("Siete Leyes"). From its formation in 1835 until its dissolution in 1846, the Centralist Republic was governed by eleven presidents (none of which finished their term). It called for the state militias to disarm, but many states resisted, including Mexican Texas, which declared independence in the Texas Revolution of 1836. During the 1840s, other provinces separated. The Republic of the Rio Grande in 1840, and the Republic of Yucatán declared independence in 1841.