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March 1

Tyler Signs Texas Annexation: War Looms with Mexico

President John Tyler signed the bill annexing the Republic of Texas, instantly transforming the nation's southern border and setting the stage for the Mexican-American War. This decisive move expanded U.S. territory by nearly one million square miles while inflaming sectional tensions over slavery that would eventually tear the country apart.

March 1, 1845

181 years ago

What Else Happened on March 1

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