. "Unknown" . "Sassanid Persian empire" . "Siege of Ctesiphon (637)"@en . "Unknown" . "The Siege of Ctesiphon (Persian: \u062A\u06CC\u0633\u0641\u0648\u0646\u200E\u200E, also known as 'Al-Mada'in \u0627\u0644\u0645\u062F\u0627\u0626\u0646 in Arabic), was a successful siege by the Rashidun army, which lasted for approximately two months from January to March 637. Ctesiphon was one of the great cities of the Persian Empire as well as an imperial capital of the Arsacids and their successors, the Sassanids."@en . . "15,000-60,000" . . . . . . "Rashidun Caliphate" . "DecisiveRashidunvictory" . . .