Avar Khaganate
In the [[Age of Migrations]] and the early [[Middle Ages]], the region belonged to several realms such as the [[Hunnic Empire|Hun Empire]], the [[Kingdom of the Gepids]], the [[Ostrogothic Kingdom|Kingdom of the Ostrogoths]], the [[Kingdom of the Lombards]], the [[Avar Khaganate]], the [[West Slavs|West Slavic]] [[Samo's Empire|state of Samo]], the [[Bulgarian Empire]], the [[Francia|Frankish Empire]], [[Great Moravia]], the [[Pannonian Slavs#Principality|Lower Pannonian Principality]] and the [[Kingdom of Syrmia]].