How a decisive victory in Spain shattered Napoleon’s southern empire
For years, the Peninsular War was a costly distraction for Napoleon. But in 1813, the tide turned. A masterstroke at Vitoria broke the French hold on Spain, launching an Allied invasion of France and signaling the beginning of the end for the Napoleonic era.
The Peninsular War (1808–1814) was a grueling conflict fought on the Iberian Peninsula, pitting French forces against a coalition of British, Spanish, and Portuguese armies. While Napoleon’s struggle in the peninsula contributed significantly to his eventual downfall, the conflict's impact on central and eastern Europe remained largely indirect until 1813. Before this turning point, the war primarily served as the main continental contribution of the British army between 1793 and 1814.
The roots of the conflict lay in Napoleon's attempt to enforce the Continental System. Following the 1807 pact with Russia, Napoleon pressured Portugal to close its ports to British trade. When Portugal hesitated, General Andoche Junot led 30,000 troops through Spain to Lisbon, arriving on November 30, 1807. This aggression destabilized the region, leading to the flight of the Portuguese royal family to Brazil and a political crisis in Spain.
In 1808, Napoleon exploited Spanish instability. After a revolt in Aranjuez led to the abdication of Charles IV, Napoleon summoned the Spanish royals to Bayonne. On May 5, 1808, he forced both Charles and Ferdinand VII to abdicate, installing his brother, Joseph Bonaparte, as King of Spain. However, the people of Madrid rose against the invaders on May 2, sparking a widespread war of independence characterized by fierce guerrilla warfare.
The momentum shifted dramatically during the final years of the war. Following a disastrous retreat from Burgos, the Duke of Wellington achieved a decisive victory at Vitoria, effectively ending Joseph Bonaparte's rule. This victory allowed Allied forces to scale the Pyrenees and storm San Sebastian, marking the first time an opposing force had invaded French territory in twenty years.
Source: 1812-13: The Brutal Final Years Of The Peninsular War
