The French invasion of Russia in 1812, also known as the Russian Campaign in France (French: Campagne de Russie) and the Patriotic War of 1812 in Russia (Russian: Отечественная война 1812 года), was a turning point during the Napoleonic Wars. It reduced the French and allied invasion forces (the Grande Armée) to a tiny fraction of their initial strength and triggered a major shift in European politics as it dramatically weakened French hegemony in Europe. The reputation of Napoleon as an undefeated military genius was severely shaken, while the French Empire's former allies, at first Prussia and then the Austrian Empire, broke their alliance with France and switched camps, which triggered the War of the Sixth Coalition.