"Lack of uniform command": 800 years ago Old Russian teams were crushed by Mongols on the Kalka River

800 years ago Mongols crushed Russian-polovetskoye army on the Kalka River. The main reason of defeat of the Russian teams historians call lack of uniform command and coordination of actions. And, as experts note, from an event on Kalka military-political elite of Ancient Russia did not draw conclusions and instead of preparing for more large-scale Mongolian invasion, continued to divide possession and to fight among themselves. Mongols as a result of collision with Russians on Kalka collected important prospecting information which used during the following campaign to Russia...