I am reading Tolstoy's War and Peace right now, and am at the part just prior to the Battle of Austerlitz, which got me thinking: what if the Austrians/Russians had won, as in totally defeated Napoleon, maybe even taking him prisoner?
What happens to France?
What does Britain do? (they are no doubt happy, since British gold financed Austria's and Russia's armies)
What happens between Russia and Austria? Early 'Holy Alliance?'