The Mexican-American War
The Mexican-American war was the first American intervention which involved an armed conflict between Mexico and the United States. The war was fought from 1846 to 1848 and was mainly caused by the 1845 annexation of Texas by the United States, which was considered by Mexico as part of its territory despite the 1836 Texas Revolution. The American forces occupied New Mexico as well as California before invading parts of the Northeastern Mexico and Northwest Mexico. Mexico persisted on disagreeing to the cession of its northern territories, American army continued to capture Mexico City and this resulted in the Treaty of Guadalupe Hidalgo.
Maciel, David & Gonzales-Berry, Erlinda. The Contested Homeland: A Chicano History of New Mexico. Prentice Hall, 2000. Print