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
Afro-Mexicans in the Mexican War of Independence the Mexican War of Independence 1810- 1821, it is estimated that about 30 to 40 percent of mixed race Mexicans had African in their mix. The decree abolishing slavery by priest Miguel Hidalgo, Mexico’s Founding Father, was a significant enticement to attract Afro-Mexicans to the fighting ranks, and there were many unsung heroes. Most of the Mexican citizens with African ascendance are located in the southern part of the territory, their location is mostly based on that the importance of the ports and harbors that connected the Pacific Ocean and the Gulf of Mexico which goes to the Atlantic. The