apr 25, 1846 - Mexican American War

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It was a war between the United States and Mexico (April 1846–February 1848) stemming from the United States’ annexation of Texas in 1845 and from a dispute over whether Texas ended at the Nueces River (Mexican claim) or the Rio Grande (U.S. claim). The war resulted in the United States’ acquisition of more than 500,000 square miles of Mexican territory expanding westward from the Rio Grande to the Pacific Ocean.

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