The capture of Kotor earned Tvrtko the enmity of George I of Zeta's brother and successor, Balša II, who also desired the city. Nothing is known about Balša's military conflict with Tvrtko except that the latter asked Venice, whose trading opportunities were threatened by the clashes, to mediate with the Lord of Zeta. The mediation was thwarted by Balša's death in a 1385 battle with the invading Ottoman Turks. Balša's nephew and successor, George II, maintained Zeta's hostility toward Bosnia.