"To "Last Sea" is a historical novel by Russian writer Vasily Yan. Genghis Khan's grandson Batu was a Mongol ruler and founder of the Golden Horde, a division of the Mongol Empire. His ulus was the chief state of the Golden Horde, which ruled Rus', Volga Bulgaria, Cumania, and the Caucasus for around 250 years, after also destroying the armies of Poland and Hungary.
