Earlier, the Sasanian king
Kavadh I had ordered a campaign which resulted in a
battle at Callinicum. Although the Persians were victorious, the victory was narrow, and no fortress was captured, thus making the campaign inconclusive. Both
Belisarius and
Azarethes, the Byzantine and Sasanian generals at Callinicum, respectively, were dismissed due to the high casualties of this battle. Emperor Justinian I then appointed
Sittas as
strategos in charge of the east. At this time, Justinian's policy was to bolster the Roman position and at the same time try to make a truce with the Persians. In
Mesopotamia,
Bessas had recently been appointed as
dux Mesopotamiae with the frontier city of
Martyropolis as his base, which was recently fortified by emperor Justinian I. From there, he performed a successful raid into the Sasanian border land of
Arzanene, killing hundreds. ==Siege==