retreat through Corduene after they could not besiege Ctesiphon. Shapur's campaign against Corduene In the spring of 360, Shapur II staged a campaign to capture the city of Singara (probably modern Shingar or Sinjar northwest of Mosul). The town fell after a few days of siege. From Singara, Shapur directed his march almost due northwards, and leaving Nisibis unassailed upon his left, proceeded to attack the strong fort known indifferently as Pinaca (Phaenicha) or Bezabde. This was a position on the east bank of the Tigris, near the point where that river quits the mountains and debouches upon the plain; though not on the site, it may be considered the representative of the modern Jezireh (Cizre in southeastern Turkey), which commands the passes from the low country into the Kurdish mountains. It was much valued by Rome, was fortified in places with a double wall, and was guarded by three legions and a large body of Kurdish archers. Shapur sent a flag of truce to demand a surrender, joining with the messengers some prisoners of high rank taken at Singara, lest the enemy should open fire upon his envoys. The device was successful; but the garrison proved staunch, and determined on resisting to the last. After a long siege, the wall was at last breached, the city taken, and its defenders indiscriminately massacred. In 363, a treaty was signed in which Jovian ceded five provinces beyond the Euphrates including Corduene and Arzanene and towns of Nisibis and Singara to the Sassanids. Following this treaty, Greeks living in those lands emigrated due to persecution of Christians at the hands of Shapur and the Zoroastrians. Corduene was a bishop's see since at least 424. In the 6th and 7th centuries In 578, the Byzantine emperor Flavius Mauricius Tiberius Augustus defeated the Sassanid army led by Chosroes I, and conquered Corduene and incorporated it once again in the Roman empire. The Roman army also liberated 10,000 Christian captives of the Sassanids. According to Khwarizmi, Arabs conquered the area along with Nisbis and Tur Abdin in 640. List of rulers Zarbienus; early mid-1st century BC: A king of Corduene who made overtures to Appius Claudius when the latter was staying at Antiocheia, wishing to shake off the yoke of Tigranes. He was betrayed and was assassinated with his wife and children before the Romans entered Armenia. When Lucullus arrived he celebrated his funeral rites