The Treaty of Guadalupe Hidalgo ended the Mexican-American War by ceding significant territory to the United States.
The Treaty of Guadalupe Hidalgo ended the Mexican-American War by confirming the U.S. title to Texas and ceding the Alta California and New Mexico territories to the United States, amounting to 525,000 square miles. Mexico lost over half of its territorial land mass in this treaty, leading to the acquisition of present-day states like California, Arizona, New Mexico, Texas, and others.
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