This is what happened in the days of Xerxes, who reigned over 127 provinces from India to Cush.
Which of the kings of Persia this Ahasuerus was the learned are not agreed. Mordecai is said to have been one of those that were carried captive from Jerusalem (Est 2:5, Est 2:6), whence it should seem that this Ahasuerus was one of the first kings of that empire. Dr.
Commenting on Esther 1:1-9
Now it came to pass in the days of Ahasuerus,.... Who he was is not easy to say; almost all the kings of Persia are so named by one or another writer. He cannot be the Ahasuerus in Dan 9:1, he was Astyages, the father of Cyaxares or Darius the Mede; but this must be one who had his royal palace in Shushan, which was...
Now it came to pass in the days of Ahasuerus, (this [is] Ahasuerus which reigned, from India even unto Ethiopia, [over] an hundred and seven and twenty provinces:) The Argument - Because of the variety of names, by which they used to call their kings, and the number of years in which the Hebrews and the Greeks vary, various authors write concerning that Ahasuerus but...