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BATTLE // February 5, 1810

Siege of Cádiz

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Overview

The French army besieged the large Spanish naval base of Cádiz from 5 February 1810 to 24 August 1812 during the Peninsular War. Following the occupation of Seville, Cádiz became the Spanish seat of power, and was targeted by 70,000 French troops under the command of the Marshals Claude Victor and Nicolas Jean-de-Dieu Soult for one of the most important sieges of the war. Defending the city were 2,000 Spanish troops who, as the siege progressed, received aid from 10,000 Spanish reinforcements as well as British and Portuguese troops.

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

Significance

The siege of Cádiz was one of the most important operations of the Peninsular War. Following the French occupation of Seville, Cádiz became the seat of Spanish political power, making its retention critical to continued organized resistance against Napoleon. A French force of up to 70,000 troops under Marshals Claude Victor and Soult invested the city beginning in February 1810, yet the garrison—initially only 2,000 Spanish troops—held out through a combination of the city's natural defensive position and the arrival of Spanish reinforcements that brought the defending strength to roughly 17,000–18,000, supplemented by British and Portuguese contingents. The siege lasted over two and a half years, tying down a large French force without result. By keeping Cádiz in Allied hands, the Spanish government retained a functioning base from which to coordinate resistance, and the city never fell. The French lifted the siege in August 1812, freeing the forces held there and preserving the political and military continuity of the Spanish war effort.

Forces & casualties

Troop strength

  • Spain17,000–18,000
    medium
  • France60,000–70,000
    medium

France fielded a 3.7 : 1 numerical advantage

Casualties

  • Spain3,706
    medium21% loss rate
  • France4,500–5,500
    medium8% loss rate

Commanders (7)

France

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6 sibling battles · 3 factions

Last verified June 2026
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