what were the terms of the peace treaty that ended the war with mexico?
Treaty of Guadalupe Hidalgo: February 2, 1848. Following the defeat of the Mexican army and the fall of Mexico City, in September 1847, the Mexican government surrendered and peace negotiations began. The war officially ended with the February 2, 1848, signing in Mexico of the Treaty of Guadalupe Hidalgo. The treaty added an additional 525,000 square miles to United States territory, including the land that makes up all or parts of present-day Arizona, California, Colorado, Nevada, New Mexico, Utah and Wyoming.