Section 1
Setting the Stage: The Treaty of Guadalupe Hidalgo (1848)
Key Idea
The Mexican-American War officially ended in 1848 with the Treaty of Guadalupe Hidalgo. This agreement forced Mexico to give up a huge portion of its land to the United States.
This territory included what would become California, New Mexico, and other parts of the Southwest. In exchange, the U.S. paid Mexico $15 million.