USA HISTORY

Detailed explanation-1: -In short, the Mexican-American War was caused because of the United States’ repeated encroachment on Mexican territory, such as its’ annexation of Texas, which Mexico refused to recognize as being independent. Therefore, Mexico also refused to recognize the claimed border between the two nations.

Detailed explanation-2: -The treaty effectively halved the size of Mexico and doubled the territory of the United States. This territorial exchange had long-term effects on both nations. The war and treaty extended the United States to the Pacific Ocean, and provided a bounty of ports, minerals, and natural resources for a growing country.

Detailed explanation-3: -It stemmed from the annexation of the Republic of Texas by the U.S. in 1845 and from a dispute over whether Texas ended at the Nueces River (the Mexican claim) or the Rio Grande (the U.S. claim).

Detailed explanation-4: -The Mexican Cession (Spanish: Cesión mexicana) is the region in the modern-day southwestern United States that Mexico originally controlled, then ceded to the United States in the Treaty of Guadalupe Hidalgo in 1848 after the Mexican–American War.