Persian Immortals Timeline

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  • c. 550 BCE - 330 BCE
    The Corps of the Ten Thousand Immortals is formed during the reign of Cyrus the Great of Persia.
  • 522 BCE - 486 BCE
    The Immortals serve under the reign of Darius I The Great of Persia.
  • 486 BCE - 465 BCE
    The Immortals serve under the reign of Xerxes I of Persia; notably in his 480 BCE invasion of Greece.
  • 336 BCE - 330 BCE
    The Immortals continue to serve under the reign of Darius III of Persia.
  • 330 BCE - 323 BCE
    Alexander the Great continues the tradition of the 10,000 Immortals.
  • 224 CE - 240 CE
    The corps of Immortals are revived as a cavalry unit during the reign of Ardashir I after he founds the Sassanian Empire.
  • 224 CE - 651 CE
    The Immortals serve as heavy cavalry of the Sassanian Empire.
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