Battle of Bailén

The Battle of Bailén was a Spanish victory over French forces in July 1808, the first major defeat of a Napoleonic army in the Peninsular War.

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Castaños's Army: The Spanish field force commanded by Francisco Javier Castaños during the 1808 campaign in Andalusia. Its maneuver toward Bailén helped force Dupont’s isolated corps into battle.
French evacuation of Madrid (1808): The French withdrawal from Madrid in August 1808 after Spanish victories and the collapse of their position in central Spain. Bailén helped make holding the capital untenable for Joseph Bonaparte’s government.
Treaty of Fontainebleau (1807): An agreement between France and Spain that permitted French troops to cross Spain to invade Portugal. Its troop movements brought French forces into Spain before the uprising that led to Bailén.
Battle of Bailén order of battle: A reconstruction of the Spanish and French forces, units, and commanders engaged at Bailén. Comparing the armies clarifies the scale and organization of the confrontation.
Pierre Dupont de l'Étang: A French general who commanded the army corps defeated at Bailén in 1808. His decision to fight and eventual surrender shaped the battle’s outcome.
Joseph Bonaparte: King of Spain from 1808 to 1813, installed by Napoleon during the Peninsular War. Bailén weakened his new regime and forced him to abandon Madrid temporarily.
Dos de Mayo Uprising: An uprising against French occupation in Madrid on 2 May 1808, violently suppressed by French troops. The revolt helped ignite the wider Spanish resistance that produced the Andalusian campaign.
Battle of Bailén surrender negotiations: The negotiations that followed the fighting and established the terms of Dupont’s surrender. The negotiations settled the fate of thousands of French troops after the battlefield victory.
Andalusian Campaign of 1808: The French and Spanish military operations in Andalusia during the opening phase of the Peninsular War. Bailén emerged from the campaign’s competing marches and separated French forces.
Napoleon's invasion of Spain: The French intervention in Spain beginning in 1807 that grew into a prolonged war against Spanish and allied resistance. The defeat exposed the limits of Napoleon’s effort to control Spain through rapid military occupation.