Battle of the Nations, or Battle of Leipzig, October 16–18, 1813. the allied victory that marked the end of Napoleon's military domination of Europe. It was fought at Leipzig, in eastern Germany, and took its name from the fact that troops from nearly all the leading nations of Europe took part. Some 500,000 men were involved in the battle. The French lost 38,000 killed and wounded, the allies 54,000. Six French generals were killed, 12 wounded, and 36 captured. The defeat forced Napoleon to retreat westward across Germany back to France. One of the prominent allied commanders was the 71-year-old Marshal Blächer of Prussia.