Tratado de Guadalupe Hidalgo

The Tratado de Guadalupe Hidalgo, signed in 1848, was a treaty that ended the Mexican-American War. It resulted in Mexico ceding a large portion of its northern territory—areas that now include California, Arizona, New Mexico, and other southwestern states—to the United States. In return, the U.S. paid Mexico $15 million and settled debts. This treaty significantly expanded U.S. territory and shaped the modern borders between the two countries. It also impacted Mexican citizens living in the newly acquired lands, many of whom became U.S. residents.