List of wars involving Serbia in the Middle Ages Frankish Empire Byzantine Empire Principality of Serbia[1][2] Duchy of Croatia Bulgarian Empire Pavle Branovic Zaharija Pribislavljević Zaharija Pribislavljević Bulgarian rebels Grand Principality of Serbia Kingdom of Hungary Byzantine Empire Byzantine Empire Grand Principality of Serbia Byzantine Empire Bulgarian Empire Kingdom of Hungary Latin Empire Kingdom of Hungary Principality of Achaea Kingdom of Sicily Kingdom of Hungary Golden Horde Ban of Croatia Zadar Realm of Stefan Dragutin Republic of Ragusa Byzantine Empire