In the first year of Darius son of Xerxes (a Mede by descent), who was made ruler over the Babylonian kingdom—
At the beginning of the reign of Xerxes, they lodged an accusation against the people of Judah and Jerusalem.
This is what happened during the time of Xerxes, the Xerxes who ruled over 127 provinces stretching from India to Cush:
And Daniel remained there until the first year of King Cyrus.
young men without any physical defect, handsome, showing aptitude for every kind of learning, well informed, quick to understand, and qualified to serve in the king’s palace. He was to teach them the language and literature of the Babylonians.
And in the first year of Darius the Mede, I took my stand to support and protect him.)
and Darius the Mede took over the kingdom, at the age of sixty-two.
It pleased Darius to appoint 120 satraps to rule throughout the kingdom,
So Daniel prospered during the reign of Darius and the reign of Cyrus the Persian.