Darius the Great

History of Iran: Darius the Great Darius I Hystaspes, or Darius the Great, king of Persia [522-486 BCE]. Through his father Hystaspes, Darius belonged to the Achaemenid family, as did Cyrus The Great and his son Cambyses II, but to a different branch of this family. When Cambyses was in Egypt, during the last year of his reign, a certain Gaumata usurped the throne by pretending to be Bardiya, Cambyses' brother, who had been assassinated secretly before Cambyses started out for his Egyptian campaign in 525 BCE.

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