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.
Name of Mexico
In September 1821, the independence of Mexico was finally recognized by Spain, achieved through an alliance of royalist and revolutionary forces. The former tried to preserve the "status quo" of the vice-royalty, menaced by the liberal reforms taking place in Spain, through the establishment of an autonomous constitutional monarchy under an independence hero. Agustín was crowned and given the titles of: Agustin de Iturbide por la divina providencia y por el Congreso de la Nación, primer Emperador Constitucional de Mexico (Agustín de Iurbide First Constitutional Emperor of Mexico by Divine Providence and by the Congress of the Nation). The name chosen for the country was "Imperio Mexicano", "Mexican Empire". The empire collapsed in 1823, and the republican forces drafted a constitution the following year whereby a federal form of government was instituted. In the 1824 constitution, which gave rise to the Mexican federation, "Estados Unidos Mexicanos" (also "Estados-unidos mexicanos")—literally the "Mexican United States" or "Mexican United-States" (official English translation: "United Mexican States")—was adopted as the country's official name. The constitution of 1857 used the term "República Mexicana" ("Mexican Republic") interchangeably with "Estados Unidos Mexicanos"; the current constitution, promulgated in 1917, only uses the latter and "United Mexican States" is the normative English translation. The name "Mexican Empire" was briefly revived from 1863 to 1867 by the conservative government that instituted a constitutional monarchy for a second time under Maximilian of Habsburg.