How a 15th-century marriage sparked a millennium of mutual hatred
In short: The concept of a 'hereditary enmity' between France and Germany wasn't born from a single war, but from a complex web of dynastic marriages, territorial seizures, and the rise of modern nationalism. What began as a struggle over Burgundian lands eventually transformed into a defining conflict of the modern era.
The roots of Franco-German tension can be traced back to the late 15th century. In 1477, the Habsburg archduke Maximilian I of Austria married Mary the Rich, securing territories that had previously belonged to the House of Valois-Burgundy. This expansion, combined with the 1493 Treaty of Senlis—which saw Maximilian annex Flanders and parts of the French-speaking Artois—placed France under significant pressure from surrounding Habsburg lands. This territorial friction set the stage for centuries of conflict, including the Italian Wars and the War of the Spanish Succession.
The relationship shifted dramatically during the 18th century. The 'Diplomatic Revolution' of 1756 saw France and the Habsburg Empire become allies against Prussia, a move justified by France's role as a guarantor of the 1648 Peace of Westphalia. However, the late 18th century saw a fundamental shift in the nature of warfare. The French Revolution introduced the 'levée en masse,' transforming war from a conflict between authorities into a clash between peoples. This transition paved the way for modern nationalism, where the humiliation of the Prussian army by Napoleon I in 1805 and 1806 fueled German national identity in direct opposition to French domination.
By the 19th century, demographic shifts and imperial ambitions intensified the rivalry. While France's population stagnated, the German states saw rapid growth, leading to a nationalist belief that a united Germany would replace France as Western Europe's dominant land power. The 1840 Rhine Crisis served as a flashpoint, where French claims to the Rhine were met with fierce German resistance. This culminated in the Franco-Prussian War of 1870–1871. Following the French defeat at the Battle of Sedan, the Treaty of Frankfurt forced France to cede Alsace-Lorraine and pay five billion francs, creating a 'trap' of resentment that would eventually contribute to the outbreak of World War I.
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- Summary by Intellect · source: French–German enmity
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