Dragutin of Serbia. Date 839 - 1330 Location Western Balkans Result Inconclusive Territorial changes Serbia was conquered twice; both states had numerous territorial changes Belligerents Bulgarian Empire Raska Duklja Kingdom of Serbia Commanders Presian Boris I Simeon Marmais Theodore Sigritsa Samuil Michael III Shishman Vlastimir Časlav Klonimirović Jovan Vladimir Stefan Dečanski The