Subutai and the Mongol invasion of Europe

In the year 1241, after very little warning, terrified monarchs all over Europe could do little but wait as a terrible and colossal wave of nomadic steppe warriors descended upon them from the eastern borders of Christendom. Tens of thousands of highly organised, highly trained and highly experienced nomadic horse archers from beyond the edge of the world. Experts at living off the land, all the Mongol war machine needed to operate was open grassland to feed its horses, cities to plunder, and glory to win,