1846-1848: Mexican-American War & British Developments By LuzEstradaVivanco Apr 25, 1846 First skirmish between U.S. and Mexican forces near the Rio Grande. May 13, 1846 The U.S. Congress officially declares war on Mexico. Sep 21, 1846 Battle of Monterrey: The U.S. captures Monterrey after intense fighting. Feb 22, 1847 Battle of Buena Vista—General Zachary Taylor repels Santa Anna’s forces. Mar 9, 1847 U.S. forces land at Veracruz in the first major amphibious assault in U.S. history. Aug 19, 1847 Battles of Contreras and Churubusco. U.S. forces advance toward Mexico City. Sep 14, 1847 U.S. troops enter Mexico City, effectively ending major combat. Feb 2, 1848 The Treaty of Guadalupe Hidalgo is signed, officially ending the war. Territorial Changes: Mexico cedes California, Texas, Arizona, New Mexico, and other lands to the U.S.
U.S. forces advance toward Mexico City.
Territorial Changes: Mexico cedes California, Texas, Arizona, New Mexico, and other lands to the U.S.