One of the first acts of King Cyrus the Great, who was a "singularly noble and just monarch," was to authorize the return of the Jews to Jerusalem and to their own land, as is stated in the book of 2Chronicles 36:22-23.
Prophecy and World Empires
The Persians were the second world empire represented in several dreams God gave to King Nebuchadnezzar of Babylon. These dreams so troubled the king that it kept him awake all night. He sought their interpretation amongst his magicians, astrologers and sorcerers - his wise men. There was, however, one catch. These 'wise men' had to first state what the king dreamed BEFORE they gave its meaning! The king was so serious about this matter that he declared if his counselors could not tell him his dream they, and their entire households, would be put to death (Daniel 2:1-5, 10, 12)!
Four of the king's wise men were the prophet Daniel and his three friends. Just before they were also to be killed Daniel told the king that he could tell him what he wanted. After Daniel and his friends prayed to God the secret of the dream - that God was foretelling all the Gentile kingdoms to rule the earth from Babylon to the Beast - was revealed (Daniel 2:27-31, 36-39).
In 539 B.C. - more than sixty years after Nebuchadnezzar's prophetic dream - Cyrus, king of the Persian empire, invaded Babylonia and defeated the Babylonians at Opis. They quickly surrendered and Cyrus' soldiers entered the capital city of Babylon without a fight.