What was the importance of the Mexican-American War in shaping modern U.S. borders? 🔊
The Mexican-American War, fought from 1846 to 1848, played a significant role in shaping modern U.S. borders. As a result of the war, the Treaty of Guadalupe Hidalgo was signed in 1848, which led to the U.S. acquiring over 500,000 square miles of territory, including present-day California, Arizona, New Mexico, Nevada, Utah, and parts of Colorado and Wyoming. This territorial expansion fueled the debate over slavery's extension into new states, significantly impacting the political landscape leading up to the Civil War. Thus, the war not only altered national boundaries but also influenced social and economic conditions in the U.S.


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