Napoleon's downfall was a long time coming, but it finally happened in 1812, when he launched a disastrous invasion of Russia. It was like he forgot that winter is a thing, and his army was freezing and starving. The Russians were like, "Hey, you wanna play? Let's play!", and they burned everything in their path, leaving the French with nothing.
The final nail in Napoleon's coffin was the Battle of Leipzig in 1813, where he was defeated by a coalition of European armies. It was like the whole continent was against him, and he was all, "Oh no, I'm surrounded!". The British played a key role in the battle, and it was like they were saying, "Hey, buddy, it's time to go home"/>.
PPT - Napoleon and the French Revolution PowerPoint Presentation - ID
