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.
Álvaro Obregón
Obregón also sought to shape public perceptions of the Revolution and its place in history by staging elaborate celebrations in 1921 on the centenary of Mexico's independence from Spain. There had been such celebrations in 1910 by the Díaz regime, commemorating the start of the insurgency by Miguel Hidalgo. The political fact of independence was achieved by former royalist officer Agustín de Iturbide, who was more celebrated by conservatives in post-independence Mexico than liberals. However, 1921 provided a date for Obregon's government to shape historical memory of independence and the Revolution. After a decade of violence during the Revolution, the centennial celebrations provided an opportunity for Mexicans to reflect on their history and identity, as well as to enjoy diversions in peacetime. For Obregón, the centennial was a way to emphasize that revolutionary initiatives had historical roots and that like independence, the Revolution presented new opportunities for Mexicans. Obregón "intended to use the occasion to shore-up popular support for the government, and, by extension, the revolution itself." Unlike the centennial celebrations in 1910, the one of 1921 had no monumental architecture to inaugurate.