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.
History of Mexico
Inspired by the American and French Revolutions, Mexican insurgents saw an opportunity in 1808 as the king abdicated in Madrid and Spain was overwhelmed by war and occupation. The rebellion began as an idealistic peasants' and miners' movement led by a local priest Miguel Hidalgo y Costilla who issued "The Cry of Dolores" on 16 September 1810; the day is celebrated as Independence Day. Shouting "Independence and death to the Spaniards!" they marched on the capital with a very large, poorly organized army. It was routed by the Spanish and Hidalgo was executed.
Another priest, Jose Maria Morelos took over and was more successful in his quest for republicanism and independence. Spain's monarchy was restored in 1814 after Napoleon's defeat, and it fought back and executed Morelos in 1815. The scattered insurgents formed guerrilla bands. In 1820, creoles, led by Agustín de Iturbide, joined the rebellion. The rebels formulated the "Plan of Iguala", demanding an independent constitutional monarchy, a religious monopoly for the Catholic Church, and equality for Spaniards and creoles. On September 27, 1821, Iturbide and the viceroy signed the Treaty of Cordoba whereby Spain granted the demands and withdrew.