History of Hispanic and Latino Americans in the United States
In 1821, Mexico gained independence from Spain, annexing the southwest of the present United States, including Arizona. As missions began to wither, Mexico began auctioning off more land, causing the Pimería Alta and the Apachería to shrink as territory expanded. In the meantime, American mountain men began to enter the region, looking to trap beavers for their pelts. In 1836, Texas declared independence from Mexico and claimed much of the territory in the northern lands of Mexico. When the United States annexed Texas in 1846 over the strong objections of the Mexican government, U.S. troops moved into disputed territory. The hostilities erupted in the Mexican–American War (1846–1848). The U.S. occupied Mexico City and forced the newly founded Mexican Republic to give up its northern half, including the later Arizona.
Fiestas Patrias (Mexico)
"Grito de Dolores" (on the evening of September 15) and "Aniversario de la Independencia" (September 16) commemorate Father Miguel Hidalgo y Costilla's "Grito de Dolores" — on September 16, 1810, in the village of Dolores, near Guanajuato. Hidalgo called for the end of Spanish rule in Mexico. On October 18, 1825, the Republic of Mexico officially declared September 16 its national Independence Day ("Dia de la Independencia").