The Mexican Frontier, 1821–1846 published by other historians. This work was supplemented by additional primary materials which he discovered in the archives that allowed him to delve further into certain areas. "The Mexican Frontier" examines the southwestern United States, specifically the areas now known as Arizona, California, New Mexico, and Texas, in the twenty-five years between Mexico's independence from Spain and the beginning of the Mexican–American War. This resulted in the transfer of control of the border areas to the United States. In the early days of the Republic of Mexico, these areas comprised its northern border, including the territories of Alta California and
Mexican War of Independence The attack was against Gelves as a bad representative of the crown and not against the monarchy or colonial rule itself. There was also a brief conspiracy in the mid-seventeenth century to unite creole elites, blacks, and indigenous against the Spanish crown and proclaim Mexican independence. The man pushing this notion called himself Don Guillén Lampart y Guzmán, an Irishman born William Lamport. Lamport's conspiracy was discovered, and he was arrested by the Inquisition in 1642, and executed fifteen years later for sedition. There is a statue of Lamport in the mausoleum at the base of the Angel of Independence