 Complete the following phrase:  The fortress passed into Sasanian hands in 363, and thereafter played a role in safeguarding the western Sasanian frontier against the Roman-Byzantine Empire. In 541, during the Lazic War, the Byzantine general Belisarius captured the fortress as well as its commander Bleschames and 800 Sasanian cavalrymen; they fought alongside the Byzantines in the Gothic War. In 589 during the 