Mexican–American War

The Mexican-American War, fought between the United States and Mexico from 1846 to 1848, stemmed from territorial disputes following the U.S. annexation of Texas in 1845 and the desire of the United States to expand westward. Key events included the U.S. invasion of Mexico, the capture of Mexico City, and significant battles such as Palo Alto, Buena Vista, and the Siege of Veracruz. The war concluded with the Treaty of Guadalupe Hidalgo, in which Mexico ceded a large portion of its northern territories to the U.S., including present-day California, Arizona, New Mexico, and Texas, significantly shaping the continental boundaries of the United States.