The Battles of Viminacium were a series of three battles fought against the Avars by the East Roman (Byzantine) Empire. They were decisive Roman successes, which were followed by an invasion of Pannonia. Priscus subsequently pursued the fleeing khagan and invaded the Avar homeland in Pannonia, where he won another series of battles on the banks of the river Tisza, deciding the war for the Romans and ending, for a time, the Avar and Slavic incursions across the Danube.