Abstract
Viking Rule (IX-XIII centuries): Kicked out of your own country? Not a problem: establish a new one (advice from Rurik). How to fend off annoying admirers (advice from Saint Olga). How to become a saint (advice from Saint Vladimir). Tatar-Mongolian Yoke (XIII-XV centuries): How to win any Medieval war (advice from Genghis Khan & Batu Khan). How to defeat heavy knights with a bunch of peasants? (strategy by Saint Alexander Nevsky). How the absence of the professional referee caused thousands of dead (memoirs of Prince Dmitri Donskoi). How to win in a stalemate (advice from Tsar Ivan III).