According to many scholars who studied it, the Campagne de France* of 1814 was one of Napoleon's best and he showed tremendeous skills with only a bunch of recruits (the so-called "Marie Louise"). He tried to split his opponents' armies and to crush them one by one and nearly succeeded. It failed ultimately with the Capture of Paris by allied troops though.
However, what would have happened if Napoleon had managed to beat his ennemies during the Campagne de France* and avoided the capture of Paris in 1814?
*That's how it's called in France. I don't t know if it's called differently elsewhere (I think I once saw it under the name Six Days Campaign)