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Mexican - American war
After a week of fighting, General Scott and his troops wear down a weary Mexican Army and seize Mexico City. The Battle of Mexico City marks the unofficial end of the Mexican-American War.April 25, 1846 The Mexican-American War begins. Led by General Anastacio Torrejon, 2,000 Mexican troops cross north of the Rio Grande River and ambush U.S. troops at Fort Texas. The Mexican-American war officially begins.