In 504-505, Theoderic's forces launched a campaign to recover Pannonia and the strategically important town of Sirmium, formerly parts of the praetorian prefecture of Italy, which were now occupied by the Gepids.
Aastatel 504–505 käivitasid Theoderichi väed kampaania Pannonia ja strateegiliselt tähtsa linna Sirmiumi tagasisaamiseks, mis ametlikult olid Itaalia pretoriaanide prefektuuri osad ja mida siis okupeerisid gepiidid.