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350 Siege of Nisibis (3rd) ★ ★ ★ ★
Outcome: Another unsuccessful siege of the fortress-city of Nisibis by the Persians 350
War  &  Enemy: Enemy:
Sassanid Persians
Later Roman-Persian Wars
Battle Type:
The Battlefield Nisibis (3rd) Location:
Modern Nusaybin, in southeastern Anatolia on the Syrian borders
Modern Country:
  The Byzantines(emperor:  Constantius II) The Enemies
Commander: General Lucilianus Shah Shapur II
Forces: Unknown Unknown
Losses: 20,000
Background story: The peace treaty after the siege of Singara (344) gave Shapur II of Sassanid Persia the time and the security he needed in his western borders to deal with the nomadic raids in the east. After securing his eastern borders, he started his second campaign against Romans in 359, a campaign that, at the end, was much more successful for the Sassanid Persians.
The Battle:
Nisibis (3rd)
Shapur II
After his previous failures to capture cities in Roman Mesopotamia, Shapur II again invaded and began a third siege of Nisibis while Roman emperor Constantius II and his army remained in Antioch.
The Persians diverted the river Mygdonius around the city to bring waterborne siege machines closer and undermine the walls, but with limited success. Ecclesiastic history attributes the salvage of Nisibis to its bishop Jacob (one of the Nicean fathers, known also as St James of Nisibis) whose prayers, miraculously, sent fleas and flies upon the enemy causing chaos and disorder. The fact is that Shapur failed once more and withdrew with heavy losses, agreeing to a truce with Emperor Constantius.