After the death of Paul I Šubić of Bribir (), Ban of Croatia and Lord of all of Bosnia, on May 1, 1312, his properties and titles were passed to his eldest son Mladen II, who already ruled over Bosnia before as a Ban of Bosnia. The young Croato-Hungarian king Charles I Robert of Anjou dynasty, who did not yet have full power over the country, tolerated an unlimited and intangible rule of Mladen II over his territory, because Mladen's father had helped Charles to come to the throne. Anyhow, Mladen II came into conflict with the Croatian noblemen in his broader neighbourhood, like the princes of Krk (future Frankopans), Gusićs (princes of Krbava) and Nelipićs, with some Dalmatian coastal towns (Šibenik, Trogir), with Stephen II Kotromanić (), Bosnian nobleman, and again with the old adversar