 This was followed by the destruction of the local Slavic tribal organization and introduction of the county system of rule.The first known prefect of the Bač county (in the region of Bačka) was recorded in 1074 and his name was Vid, which is a Slavic name by origin.During the rule of the Hungarian king Coloman (1095–1116), the local Serb nobles in Bačka were Uroš, Vukan and Pavle.