This Day In History

 

May 13, 1846

U.S. declaration of war on Mexico approved

Tensions between Mexico and the United States—stemming from the U.S. annexation of Texas (1845)—led the U.S. Congress on this day in 1846 to approve overwhelmingly a declaration of war against Mexico

Taken from: https://www.britannica.com/on-this-day/May-12