When the Mexican-American War ended, the United States received the Mexican Cession which included all of California, Nevada and Utah, and parts of Arizona, New Mexico, Colorado, and Wyoming. With this huge land acquisition, the issue of slavery in the new territories was raised. read more
It meant an increase of US territory (California, Nevada, Utah, Arizona, and New Mexico, as well as parts of Wyoming, Colorado, Oklahoma and Kansas) at the expense of Mexico. It also renewed the slavery question for the acquired territories, and therefore ultimately contributed to the American Civil War. read more