Yucatán joined the Federation in 1823 under a special status, the
Federated Republic, as stipulated by the
Constitution of Yucatán of 1825. When the Federal system was changed to a Centralist system, Yucatán considered their pact with Mexico dissolved. After several demands by Yucatán to the Central government to restore the Federalist
Constitution of 1824, revolution broke out in Yucatán on 29 May 1839. After a series of victories by the Yucatán militia against Mexican Army installations and troops, the Central Government declared war on Yucatán. On 4 March 1840, the Congress of Yucatan decreed that as long as the Mexican nation is not governed according to federal law, the
State of Yucatán would remain separated from it, retaining the power to establish its own legislature. On March 31, 1841, a new constitution of Yucatán was enacted, which established innovations such as freedom of worship, freedom of the press and the constitutional and legal bases of the
Writ of Amparo. On October 1, 1841, the Chamber of Deputies of Yucatán issued the Act of Independence of the Yucatán Peninsula. Santa Anna sent retired Mexican Supreme Court Justice and revolutionary hero
Andrés Quintana Roo to dialogue with the Yucatecan authorities to negotiate their return to Mexico. The meeting resulted in signed treaties that were beneficial for Yucatán, and which were later rejected by Santa Anna. Santa Anna then sent Mexican troops to Yucatán to quell the rebellion, but his troops were defeated. Having failed to subdue the peninsula, Santa Anna then imposed a trade blockade. The blockade forced the Yucatecan authorities to negotiate with Santa Anna. On 5 December 1843, new treaties were signed that restored Yucatán relations with Mexico, but Yucatán continued to govern itself under its own laws and leaders. In 1845, Mexican President
José Joaquín de Herrera set aside those treaties and again raised tensions between Yucatán and Mexico. After
Federalism was restored in 1846, Yucatán decided to rejoin Mexico, but a considerable minority opposed the reinstatement due to the U.S. invasion of Mexico in the
Mexican–American War (1846–48). On 30 July 1847, Yucatán's Maya population rebelled in a conflict now known as the
Caste War. The war forced Yucatán to seek help from Mexico, which negotiated their return to the Republic, which took place on 17 August 1848. The conflict in Yucatan was largely contained, with the Yucatecan government declaring victory. However, pockets of resistance continued to exist for another 50 years, when Mexican army troops destroyed the last Maya stronghold. The
flag of the Republic of Yucatán, created as part of its declaration of independence from Mexico, is still widely used as a civil emblem in the state and there are proposals even today to adopt it as the official state flag. Engraved stone tells a few episodes of the Caste War between 1854 and 1855. Although the Centralist regime had already formally disappeared by that time, the stone still mentions the "Department of YUCATÁN". ==Notes==