Ep 7. Kalka River: Genghis Khan's General-1223

More than 40,000 Russians were slain at the hands of the Mongols at the Kalka River, including six princes and 70 noblemen. Examine the factors that led to the allied army's defeat, from underestimating the Mongols to repeatedly allowing their leader, Subotai, to maneuver his opponents onto ground of his own choosing.