full name Napoleon Bonaparte. 1769–1821, Emperor of the French (1804–15). He came to power as the result of a coup in 1799 and established an extensive European empire. A brilliant general, he defeated every European coalition against him until, irreparably weakened by the Peninsular War and the Russian campaign (1812), his armies were defeated at Leipzig (1813). He went into exile but escaped and ruled as emperor during the Hundred Days. He was finally defeated at Waterloo (1815). As an administrator, his achievements were of lasting significance and include the Code Napoléon, which remains the basis of French law