Republic of Yucatán [SEP] dissolved or abolished
modern Mexican states of Yucatán, Campeche and Quintana Roo. The Republic of Yucatán usually refers to the Second Republic (1841–1848).
The Republic of Yucatán was governed by the Constitution of 1841, one of the most advanced of its time. It guaranteed individual rights, religious freedom and what was then a new legal form called "amparo" (). The 1847 Caste War caused the Republic of Yucatán to request military aid from Mexico. This was given on the condition that the Republic rejoin the Mexican Federation.
the Republic of Texas
- Coahuila, Nuevo León, and Tamaulipas declared themselves independent of Mexico on January 17, 1840, as the Republic of the Rio Grande. The Republic was never truly independent, since the rebels were quickly overthrown. The Republic was dissolved on 6 November 1840
- Yucatán, which had joined to the federation under the condition of a "Federated Republic", declared its independence in 1840 (officially on October 1, 1841). This historic event resulted in the birth of the second Republic of