subject of the king of Babylonia, that returned to the Persians of Kyros III and contributed ver actively to the fall of the Mesopotamien capital, of which he was next named king or governor by Kyros III [Ref: Settipani LGA p145]
possible that he is the "Dareios of Mede" mentioned by prophet Daniel, that obtained at age 62 the kingship of Babylone after it was taken by Persians, and is confused with Dareios I [Ref: Settipani LGA p145]
Assisted Cyrus in capturing the city and as having personally killed th e king