Darius I becomes King of Persia. He expands the empire and divides it up into states each ruled by a governor called a satrap. (7h 10min, dec 30, 521 y BC – 11h 22min, apr 23, 520 y BC)
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Date:
7h 10min, dec 30, 521 y BC
11h 22min, apr 23, 520 y BC
~ 1 years and 8 months