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BATTLE // May 21, 1809

Battle of Aspern-Essling

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Source · Wikipedia

Significance

The Battle of Aspern-Essling marked the first time Napoleon was personally defeated in a major battle and his first battle defeat in ten years, since the siege of Acre. It was also his first battle defeat as head of state. The engagement began when Napoleon crossed the Danube near Vienna, only for the French force of roughly 80,000 to be attacked and driven back across the river by Archduke Charles commanding approximately 98,000 Austrians. Although Archduke Charles succeeded in forcing the French withdrawal, he fell short of destroying their army. France suffered over 20,000 casualties, including Marshal Jean Lannes, described as one of Napoleon's ablest field commanders and closest friends. The battle demonstrated that Austrian forces, under capable leadership, could contest and reverse a Napoleonic offensive, carrying significant psychological and strategic weight within the War of the Fifth Coalition.

Forces & casualties

Troop strength

  • Austria98,000
    medium
  • France80,000
    medium

Austria fielded a 1.2 : 1 numerical advantage

Casualties

  • Austria23,000
    medium23% loss rate
  • France20,000
    medium25% loss rate

Commanders (14)

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Last verified June 2026
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