Napoleon suffered his first major defeat at the Battle of Leipzig, also known as the Battle of Nations, which occurred from October 16 to 19, 1813. This battle involved a coalition of forces from Russia, Prussia, Austria, and Sweden, against Napoleon’s army. It marked a turning point in the Napoleonic Wars, as the coalition's decisive victory diminished Napoleon's power in Europe. The defeat forced him to retreat and eventually led to the abdication of his throne. The Battle of Leipzig was significant as it not only highlighted Napoleon's vulnerabilities but also set the stage for his eventual downfall.