Cyrus (580-529 BC) was the first Achaemenid Emperor. He founded Persia by uniting the two original Iranian Tribes- the Medes and the ... all » Persians. Although he was known to be a great conqueror, who at one point controlled one of the greatest Empires ever seen, he is best remembered for his unprecedented tolerance and magnanimous attitude towards those he defeated. Upon his victory over the Medes, he founded a government for his new kingdom, incorporating both Median and Persian nobles as civilian officials. The conquest of Asia Minor completed, he led his armies to the eastern frontiers. Hyrcania and Parthia were already part of the Median Kingdom. Further east, he conquered Drangiana, Arachosia, Margiana and Bactria. After crossing the Oxus, he reached the Jaxartes, where he built fortified towns with the object of defending the farthest frontier of his kingdom against nomadic tribes of Central Asia.
The victories to the east led him again to the west and sounded the hour