It had to, after losing the Mexican-American War (1846-1848).
1848.
Arizona, California, Nevada, Utah and New Mexico.
California and New Mexico.
California, Arizona, New Mexico,Texas, Nevada, Utah, and parts of Colorado and Wyoming.
The issue of slavery in the territory ceded by Mexico was decided by the Compromise of 1850, which allowed residents to determine whether to allow slavery through popular sovereignty. This meant that the territories of New Mexico and California could decide on the slavery issue for themselves when applying for statehood.
Mexico did, after the Mexican-American War (1846-1848).
The Mexican States of Alta California and Nuevo Mexico.
The Wilmot Proviso is the answer
Not at all. The territories won over from Mexico were present-day California, Nevada, Utah, and parts of Colorado, Arizona, New Mexico, and Wyoming.
After the war with Spain, Puerto Rico, Cuba, Phillipines and Guam were ceded to the U.S. under the treaty. The war with Mexico was different which ceded land to the U.S. from the Rio Grande as part of the treaty.
None. All territories Mexico ceded to the United States were already lost by that date. See related questions.
The Treaty of Guadalupe Hidalgo , 1848