- Ended the Mexican-American War.
- Mexico ceded over half of its territory to the United States, including the present-day states of California, Nevada, Utah, Arizona, New Mexico, and parts of Colorado and Wyoming.
- The United States paid Mexico $15 million for the land.
Gadsden Purchase (1853)
- Purchased from Mexico by the United States for $10 million.
- Added about 29,000 square miles to the United States, including most of the present-day state of Arizona and parts of New Mexico and Texas.
- The purchase was made to secure a better route for a transcontinental railroad.
Both treaties were important in shaping the boundaries of the present-day United States. The Treaty of Guadalupe Hidalgo was the more significant of the two, as it resulted in the United States acquiring a vast amount of territory from Mexico. The Gadsden Purchase, while smaller in size, was also important as it secured a key route for a transcontinental railroad.