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They did not - theirs was a very static and stable empire.
They settled in southern Iran - became a subsidiary of Media - dominated the Medes - used their combined resources to takeover Babylon - expanded trough west Asia and central Asia, - then into north Africa - then into eastern Europe creating an empire that stretched from Libya to Pakistan.-
Gaining an empire is its own reward.
The Persians absorbed the Phoenicians into their empire, and used their resources.
Persians
No.
The Persians
Alexander the Great conquered the Persian Empire and converted it into an empire of his own, not to destroy the Persians but to convert them to Greek culture.
The Persians conquered the Babylonian Empire in 539 BCE.
He was not mean to the Persians - he led them to form the greatest empire of the time.
The Song dynasty was threatened by Nomadic warriors in 1126.
It expanded the Persians.