Mexican War of Independence
Although Mexico gained its independence in September 1821, the marking of this historical event did not take hold immediately. The choice of date to celebrate was problematic, because Iturbide, who achieved independence from Spain, was rapidly created Emperor of Mexico. His short-lived reign from 1821–22 ended when he was forced by the military to abdicate. This was a rocky start for the new nation, which made celebrating independence on the anniversary of Iturbide's Army of the Three Guarantees marching into Mexico City in triumph a less than perfect day for those who had opposed him. Celebrations of independence during his reign were marked on September 27. Following his ouster, there were calls to commemorate Mexican independence along the lines that the United States celebrated in grand style its Independence Day on July 4. The creation of a committee of powerful men to mark independence celebrations, the "Junta Patriótica", organized celebrations of both September 16, to commemorate Hidalgo's grito and the start of the independence insurgency, and September 27, to celebrate actual political independence.
Centralist Republic of Mexico
Months later, Antonio López de Santa Anna, in response to the declaration of independence, threatened to send in the troops if it was not reversed while also assuring the Tabasco authorities that Federalism would soon be reinstated. This combined threat and promise culminated in the reinstatement of Tabasco into the Mexican Republic on December 2, 1842. But four years later, Tabasco again declared its independence in November 1846 as a protest to the lack of Central government assistance in resisting the American occupation of its coast earlier that same year.