"Some less-recent sources speculate about the losses in this battle, but in Peter Jackson's expert-opinion, the second passage relates to the size of Jebe/Subutai's army, not the number of Mongol "survivors" from the ambush - however, there is no mention in the alternative tale of any encounter with the Bulgars.In this history, no mention is made of who commanded the military probe that was ambushed, or how large it was.