Mexican Cession Mexican Cession, with considerable local autonomy punctuated by several revolts and few troops sent from central Mexico, in the period from 1821–22 after independence from Spain up through 1846 when U.S. military forces seized control of California and New Mexico on the outbreak of the Mexican–American War. The northern boundary of the 42nd parallel north was set by the Adams–Onís Treaty signed by the United States and Spain in 1821 and ratified by Mexico in 1831. The eastern boundary of the Mexican Cession was the Texas claim at the Rio Grande and extending north from the headwaters of the Jojo
Eric Van Young Eric Van Young Eric Van Young, Distinguished Professor of History at University of California, San Diego, is an American historian of Mexico who has published extensively on socioeconomic and political history of the colonial era and the nineteenth century. He is particularly well known for his 2001 book, "The Other Rebellion: Popular Violence, Ideology, and the Struggle for Mexican Independence, 1810-1821", which won a major prize awarded by the Conference on Latin American History. His article "The Islands in the Storm: Quiet Cities and Violent Countrysides in the Mexican Independence Era," published in "Past and Present" won the Conference on