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BATTLE // July 16, 1808

Battle of Bailén

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Overview

The Battle of Bailén was fought in 1808 between the Spanish Army's Army of Andalusia, under General Francisco Javier Castaños and the French Imperial Army's 2nd Gironde Observational Corps under Divisional-General Pierre Dupont de l'Étang. The first open-field defeat of a Napoleonic army, the battle's heaviest fighting took place near Bailén, a village by the Guadalquivir river in the Jaén province of southern Spain.

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

Significance

The Battle of Bailén marked the first open-field defeat of a Napoleonic army, a result that carried immediate strategic and psychological consequences across Europe. Spain's Army of Andalusia under Castaños, numbering roughly 30,000 troops, forced the French 2nd Gironde Observational Corps under Dupont, estimated at up to 24,000, to suffer around 3,000 casualties against Spanish losses of approximately 1,000. The outcome demonstrated that French Imperial forces were not invincible in conventional pitched battle, undermining the aura of Napoleonic military supremacy that had dominated European affairs since the mid-1790s. Within the Peninsular War, Bailén halted French consolidation in southern Spain and signaled to other European powers that organized resistance could produce results, reinforcing the broader Coalition effort against Napoleon's imperial ambitions.

Forces & casualties

Troop strength

  • Spain29,770–30,000
    medium
  • France20,000–24,430
    medium

Spain fielded a 1.3 : 1 numerical advantage

Casualties

  • Spain1,000
    medium3% loss rate
  • France3,000
    medium14% loss rate

Commanders (2)

France

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6 sibling battles · 3 factions

Last verified June 2026
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