The Mexican Cession resulted in Mexico losing nearly one million square miles of territory to the United States following the Mexican-American War from 1846 to 1848. Under the Treaty of Guadalupe Hidalgo in 1848, Mexico ceded lands of present-day California, Nevada, Utah, most of Arizona, and parts of Colorado, New Mexico, and Wyoming in exchange for $15 million from the United States. While the treaty granted citizenship to Mexicans living in the ceded lands, much of their property was lost in the following decades as it was acquired by American settlers and businesses.