What did Mexico give to the US. in the Mexican cession?

In the Mexican Cession of 1848, Mexico ceded a vast territory to the United States following the Mexican-American War. This area included present-day California, Nevada, Utah, Arizona, and parts of Colorado and New Mexico. In exchange, the U.S. paid Mexico $15 million and assumed certain claims of American citizens against the Mexican government. This acquisition significantly expanded U.S. territory and fueled debates over slavery and expansionism.