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BATTLE // October 28, 1811

Battle of Arroyo dos Molinos

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Overview

The Battle of Arroyo dos Molinos took place on 28 October 1811 during the Peninsular War. An allied force under General Rowland Hill trapped and defeated a French force under General Jean-Baptiste Girard, forcing the latter's dismissal by the Emperor Napoleon. A whole French infantry division and a brigade of cavalry were destroyed as viable fighting formations.

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

Significance

At Arroyo dos Molinos on 28 October 1811, a British-led allied force under General Rowland Hill trapped and defeated a French force under General Jean-Baptiste Girard, inflicting roughly 1,300 casualties on a French army of approximately 3,000 men. The action effectively destroyed an entire French infantry division and a cavalry brigade as viable fighting formations, removing those units from the order of battle in the Peninsular theater. The defeat carried immediate command consequences: Napoleon dismissed Girard following the engagement. In a war characterized by attritional raiding and the steady erosion of French strength in Iberia, the elimination of two formed units in a single action represented a meaningful operational loss for French forces, reducing their capacity to control the region and support larger campaign objectives.

Forces & casualties

Troop strength

  • United Kingdom5,000
    medium
  • France3,000
    medium

United Kingdom fielded a 1.7 : 1 numerical advantage

Casualties

  • France1,300
    medium43% loss rate

Commanders (2)

France

United Kingdom

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6 sibling battles · 3 factions

Last verified June 2026
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