Darius I, or Darius the Great, was a general under Cambyses II, who took the throne after killing either Bardiya, the son of Cyrus II and brother of Cambyses, or an impostor pretending to be Bardiya. Under Darius Iβs rule the empire was consolidated and reorganized. He put down a number of rebellions early in his reign and expanded the empire to the northern parts of the Indian subcontinent in the east and into Greece in the west.
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