Page "Gallienus" Paragraph 24

Then another, even more numerous, army of invaders started a second naval invasion of the Balkans.

Romans defeated the barbarians on sea at first, then a battle in Thrace was won by Gallienus's army and the Emperor kept pursuing the invaders.

According to some historians, he was the leader of the army who won the great Battle of Naissus, while the majority believes that the victory must be attributed to his successor Claudius II.