Volga Bulgaria was among the states which were conquered by the forces of Genghis Khan's Mongol Empire. (PROSE: The Time Traveller's Almanac [+]Steve Tribe, BBC Books (2008).)
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Volga Bulgaria was among the states which were conquered by the forces of Genghis Khan's Mongol Empire. (PROSE: The Time Traveller's Almanac [+]Steve Tribe, BBC Books (2008).)