"Siege of Dara (573)"@en . "The Siege of Dara occurred in 573, during the Byzantine\u2013Sasanian War of 572\u2013591. The siege lasted 4 months and ended with the city's fall to the Sasanian Persians. The news of the fall of Dara, long a major Byzantine stronghold in Upper Mesopotamia, reportedly drove Emperor Justin II insane."@en . . "Byzantine Empire" . . . . . . . . "Sasanian Empire" . "Sasanian victory" .