The Cumans and the Tatars were nomadic warriors of the Eurasian steppe who exerted an enduring impact on the medieval Balkans. With this work, Istv?n V?s?ry presents an extensive examination of their history from 1185 to 1365. The basic instrument of Cuman and Tatar political success was their military force, over which none of the Balkan warring factions could claim victory.