Achaemenian Empire The Achaemenian Empire founded by Cyrus in 559 B.C founded through a series of wars. Ended in 331 B.C with the invasion of Alexander the Great. The empire was the largest the world had ever seen and developed an early postal system. (jan 1, 559 BC – jan 1, 331 BC)
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jan 1, 559 BC
jan 1, 331 BC
~ 228 years