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 the west coast of North America
After the Spanish possession now known as Mexico (first known as "América Septentrional" or "Northern America") won its War of Independence from Spain in 1821, Mexico initially retained Spain's missions and settlements along the Pacific coast, and continued Spain's claims to territory as far north as today's border between California and Oregon. In the 1830s, Mexico ended Church control of the missions in California and opened the land to secular development, particularly ranching. By the 1840s, there were small Mexican settlements at San Diego, Los Angeles, San Francisco, and the territorial capital at Monterey. These settlements primarily traded cattle hides and tallow with American and European merchant vessels. This period is vividly portrayed in Bostonian Richard Henry Dana, Jr.'s famous seafaring memoir, "Two Years Before the Mast" and the culture of the great Mexican landowners of this period is often harked back to as exemplifying the height of California's romantic pastoral era. Mexican control of the territory ended after only 25 years, when attempts by local Mexican officials to expropriate the property of American ranchers and drive them out of California in the winter lead to the successful uprising known as the Bear Flag Revolt.