USA HISTORY

Detailed explanation-1: -It followed the 1845 American annexation of Texas, which Mexico still considered its territory. Mexico refused to recognize the Treaties of Velasco, because they were signed by President Antonio López de Santa Anna while he was captured by the Texas Army during the 1836 Texas Revolution.

Detailed explanation-2: -The immediate cause of the Mexican-American War was a disputed boundary between the United States and Texas on the Nueces Strip.

Detailed explanation-3: -Polk and others saw the acquisition of Texas, California, Oregon, and other territories as part of the nation’s Manifest Destiny to spread democracy over the continent. The U.S. also tried to buy Texas and what was called “Mexican California” from Mexico, which was seen as an insult by Mexico, before war broke out.

Detailed explanation-4: -Texas used to be Mexico’s state of Coahuila y Texas. Coahuila remained in Mexico. May 14, 1836: The Treaties of Velasco ends the Texas Revolution with the creation of the Republic of Texas. 1837: Texas claims the Rio Grande as its border with Mexico.

Detailed explanation-5: -By its terms, Mexico ceded 55 percent of its territory, including the present-day states California, Nevada, Utah, New Mexico, most of Arizona and Colorado, and parts of Oklahoma, Kansas, and Wyoming.