The notable treaty signed in 1848 following the Mexican-American War is the Treaty of Guadalupe Hidalgo. This treaty marked the end of the conflict between the United States and Mexico, which had begun in 1846. Under its terms, Mexico ceded a significant portion of its northern territories to the United States, including present-day California, Arizona, New Mexico, Nevada, Utah, and parts of Colorado and Wyoming. In exchange, the U.S. paid Mexico $15 million and assumed claims of American citizens against the Mexican government. The treaty significantly expanded U.S. territory and shaped the future of the nation.