Mexico-United States [1846–1848]
https://www.britannica.com/event/Mexican-American-War
Mexican-American War, also called Mexican War, Spanish Guerra de 1847 or Guerra de Estados Unidos a Mexico (“War of the United States Against Mexico”), war between the United States and Mexico (April 1846–February 1848) stemming from the United States’ annexation of Texas in 1845 and from a dispute over whether Texas ended at the Nueces River (Mexican claim) or the Rio Grande (U.S. claim).
The war—in which U.S. forces were consistently victorious—resulted in the United States’ acquisition of more than 500,000 square miles (1,300,000 square km) of Mexican territory extending westward from the Rio Grande to the Pacific Ocean.
Scroll down the page at the link above to get much more information.
thanks for the history lesson.
If you ever visit Universal Studios in California, you can also visit Campo de Cahuenga, right at the bottom of the hill, near where the trolley takes you up to Universal Studios
Campo de Cahuenga is the site of the signing of the Treaty of Cahuenga in January 1847. This document was instrumental in ending the conflict over the southwest territory between the United States and Mexico.