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ORDER OF BATTLE // March 5, 1811

Battle of Barrosa

Estimated force strength by side, with confidence labels per surviving record.

Forces engaged

2 sides catalogued · combined 22,000 estimated

  • United Kingdom

    12,000

    Medium-confidence figure

  • France

    10,000

    Medium-confidence figure

Battle context

Barrosa arose from an Anglo-Iberian attempt to lift the French siege of Cádiz, one of the strategic anchors of British operations in the Peninsular War. The broader maneuver failed in its objective — the siege of Cádiz was not broken — yet the engagement itself produced a notable British tactical success. A single British division engaged and defeated two French divisions, inflicting roughly 3,000 casualties against a force of 10,000, while sustaining approximately 2,800 of its own. The capture of a French regimental eagle stood as a tangible emblem of battlefield dominance even within an operationally inconclusive effort. The battle illustrated the persistent tension between British and Spanish command, as the combined Anglo-Iberian force of 12,000 was unable to translate a local victory into the larger relief of Cádiz, underscoring how coalition coordination problems repeatedly constrained Allied effectiveness during the Peninsular campaign.

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Sources (15)

Last verified June 2026
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