Napoleonic Wars (1803-1815)

The Napoleonic Wars fundamentally reshaped Europe by spreading revolutionary ideals — liberty, equality, the Napoleonic Code, and meritocracy — across a continent dominated by hereditary aristocracy. An estimated 5 million people perished, nearly 2 million fewer deaths than the #6 Thirty Years War, yet its political impact was more enduring. The Congress of Vienna (1815) established a balance of power that prevented great-power war for nearly a century, while nationalism unleashed by Napoleon directly spurred German and Italian unification. The Napoleonic Code remains the foundation of civil law in over 70 countries, outlasting the empires that opposed it. This war created 4 million French veterans whose pensions burdened the state for decades — a 2% annual drain on GDP until 1850.