“Now I will announce
The truth
To you.
Three more kings
Shall arise
In Persia.
The fourth shall be
Far richer
Than all of them.
When he has become strong,
Through his riches,
He shall stir up all
Against the kingdom of Greece.”
Next this angel Gabriel was going to tell Daniel the truth about 3 or 4 more Persian kings. This assumes that Cyrus the Great (559-530 BCE) was the king at that time. The 3 more are probably Cambyses II (530-522 BCE), Darius I (522-486 BCE), and Xerxes I (486-465 BCE), who all went to war with Greece. The 4th Persian ruler might have been Artaxerxes (465-424 BCE). Notice that most of these Persian rulers ruled for long periods of time with their biggest enemy being Greece.
Eugene Finnegan Bible Project 