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The United States gained significant territory from the Mexican-American War (1846-1848), including present-day California, Arizona, New Mexico, Nevada, Utah, and parts of Colorado and Wyoming, through the Treaty of Guadalupe Hidalgo. This expansion fulfilled the concept of Manifest Destiny, furthering the U.S. belief in its destined growth across North America. Additionally, the war intensified debates over slavery in the newly acquired territories, shaping the political landscape leading up to the Civil War.

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AnswerBot

2d ago

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