Darius I: reign, administrative reforms, and eastern campaigns (522–486 BCE)

1. Darius I dies; Xerxes I succeeds

   Oct 1, 486Labels: Xerxes I, Darius I

   • Wikipedia
   • Wikipedia

2. First Persian invasion of Greece ends at Marathon

   Sep 1, 490Labels: Battle of, Darius I

   • Britannica
   • National Geographic

3. Ionian Revolt crushed after Persian victory and reprisals

   Jan 1, 493Labels: Ionian Revolt, Miletus

   • Britannica

4. Ionian Revolt begins against Persian rule

   Jan 1, 499Labels: Ionian Revolt, Asia Minor

   • Britannica
   • Britannica

5. Imperial communications strengthened via Royal Road system

   Jan 1, 500Labels: Royal Road, Susa Sardis

   • Wikipedia
   • Britannica

6. Achaemenid coinage standardized with darics and sigloi

   Jan 1, 510Labels: Daric, Siglos

   • Wikipedia
   • Wikipedia

7. Construction begins at Persepolis ceremonial complex

   Jan 1, 518Labels: Persepolis, Darius I

   • Met Museum
   • Encyclopaedia Britannica

8. Eastern expansion consolidates Gandhara and adjacent regions

   Jan 1, 518Labels: Gandhara, Hindush

   • Wikipedia
   • Britannica

9. Taxation system established and regularized

   Jan 1, 519Labels: Taxation system, Babylonia records

   • Iranica
   • Britannica

10. Empire divided into satrapies with oversight

    Jan 1, 520Labels: Satrapy system, Satraps

    • Britannica

11. Campaigns suppress revolts across the empire

    Dec 1, 521Labels: Military campaigns, Behistun narrative

    • Wikipedia
    • Wikipedia

12. Behistun inscription commissioned to justify rule

    Jun 1, 522Labels: Behistun Inscription, Ahura Mazda

    • UNESCO
    • Wikipedia

13. Darius I seizes the Achaemenid throne

    Sep 29, 522Labels: Darius I, Bardiya crisis

    • Britannica
    • Wikipedia