Battle of Leipzig
From The Art and Popular Culture Encyclopedia
The Battle of Leipzig or Battle of the Nations, fought on 16–19 October 1813, was one of the most decisive defeats suffered by Napoleon. The battle was fought on German soil and involved German troops on both sides, as a large proportion of Napoleon's troops actually came from the German Confederation of the Rhine. The battle involved over 600,000 soldiers, making it the largest battle in Europe prior to World War I.
Knocked back on his heels, Napoleon returned to France, while the Allies kept their momentum, invading France early the next year. Napoleon was forced to abdicate, and was exiled to Elba that spring.