During this same period other tribal groups such as the Aramaeans and the Sea Peoples were causing chaos further west.
Despite occasional theories which have them descending from the Caucuses, the Persians were clearly of Indo-Iranian stock, an Indo-European grouping which formed in Central Asia, somewhere between modern Kazakhstan and Afghanistan.
The victorious Cyrus is portrayed as having been chosen by the chief Babylonian god Marduk to restore peace and order to the Babylonians.
The text states that Cyrus was welcomed by the people of Babylon as their new ruler and entered the city in peace.
The book of Daniel is an apocalyptic of the Old Testament.