<p>Personally, I think that even if Napoleon had won every single campaign, the empire he cobbled together would not have outlasted him. It might have unravelled even earlier as it was too hastily built out of too many disparate peoples. An even more interesting what if question is what would have happened if the Mongol leader Batu, grandson of Gengis Khan, poised on the bank of the Danube, had not hastened back in 1242 to take part in the kuriltai to choose the next Great Khan but had proceeded to invade Western Europe as he had earlier planned?</p>