was recorded by Procopius (writing in the mid-6th century CE), who mentions an attack of the Antes, "who dwell close to the Sclaveni", probably in 518. In the 530s, Emperor Justinian seems to have used divide and conquer policies, and the Sclaveni and Antes are mentioned as fighting each other.

Sclaveni are mentioned in the context of the military policy on the Danube frontier of Byzantine Emperor Justinian I . In 537, Justinian shipped 1,600 cavalry, made up of mostly Sclaveni and Antes, to Italy