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BATTLE // January 1, 1846

Battle of Monterrey

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Overview

In the Battle of Monterrey during the Mexican–American War, General Pedro de Ampudia and the Mexican Army of the North was defeated by the Army of Occupation, a force of United States Regulars, Volunteers, and Texas Rangers under the command of General Zachary Taylor.

Overview adapted from Wikipedia, licensed under CC BY-SA 4.0.

Significance

The Battle of Monterrey resulted in a Mexican defeat when General Pedro de Ampudia's Army of the North was overcome by General Zachary Taylor's Army of Occupation, a combined force of U.S. Regulars, Volunteers, and Texas Rangers. The engagement demonstrated the operational reach of American forces into northern Mexico and affirmed Taylor's capacity to prosecute offensive operations against organized Mexican resistance. With Mexican forces numbering slightly more than the American contingent, the outcome reflected a significant reversal for Mexico's northern defensive posture during the early phase of the war.

Forces & casualties

Troop strength

  • United States6,220
    medium
  • Mexico7,303
    medium

Mexico fielded a 1.2 : 1 numerical advantage

Casualties

  • États-Unis120–368
    medium
  • Mexique367
    medium

Commanders (3)

United States

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Related

6 sibling battles · 2 factions

Last verified June 2026
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