Hungarian local nobleman Kiš (variously styled as Kisa, Kijs, Kiis, Kys or Chys) attacked Časlav's domain in Bosnia. Časlav resisted in the "Županija of Drina", and the Kiš was apprehended and beheaded by the Serbian army in the clash on the banks of the Drina river, while his head was sent to Časlav. In retaliation, the Hungarians attacked again. This time the clashes occurred in the "Syrmian plains, south of the Sava". Though today Syrmia is a region north of the Sava, in the Middle Ages the plain of Mačva, which is the southern extension of Syrmia across the river, was also called Syrmia as both regions were mostly ruled by Hungarians. This time it was Časlav who was captured. On the orders of the Kiš' widow, Časlav and all his relatives were bounded and thrown into the Sava. The events, known as the Magyar–Serb conflict, are placed sometime between 950 and 960.