- Mar 2016
There's simply no scenario where the Napoleonic Empire endures long beyond Napoleon I's death, even assuming that he somehow is victorious against his many enemies (which already was never going to happen, after 1812). Napoleon's empire only lasted as long as it did because of his sheer force of will and military greatness, and even that didn't last forever. The moment Napoleon I died (which, like Stevev said, would be around to 1821 because of his health problems), his enemies would pounce and nominal allies and subjects would rebel.In this scenario there was no St/ Helena exile or an Elba exile because Napoleon won. Maybe he doesn;t invade Russia, or maybe he gains a marginal victory in which he leaves Russia before the onset of winter and leaves it with an intact grand armee, or he gains a decisive battle early in the campaign forcing Alexander to capitulate and renew the Tilsit treaty. It doesn't mattter,. but the scenario is he wins. There is no Napoleon III atleast as we know it because I would imagine the succession when Napoleon dies would pass to his son Napoleon Francois, when he dies the succession passes to his son, whoever he may have been in which case its a different Napoleon III.
How his successors will manage the empire however, is another matter, but let's assume they govern it relatively well, they're peaceful rulers, relations with Britain normalizes and the 19th century ushers in a long era of peace on the continent known as Pax Gallica or something.