-Babylonian welcomed Cyrus as a liberator; He freed a lot of Jews from Babylon. For this, Cyrus showed great forbearance and respect towards the religious beliefs and cultural traditions of other races. These qualities earned him the respect and homage of all the people over whom he ruled.
-He conquered the Mede’s and after that he founded a government for his new kingdom, incorporating both Median and Persian nobles as civilian officials.
-He conquered the Mede’s and after that he founded a government for his new kingdom, incorporating both Median and Persian nobles as civilian officials.
-He founded a new capital city at Pasargade in Fars and also established a government for his Empire.
-He declared the first charter of human rights known to mankind.
-He invented the first postal system; adopted by the future emperors of the Achaemenian dynasty.
-He declared the first charter of human rights known to mankind.
-He invented the first postal system; adopted by the future emperors of the Achaemenian dynasty.

- Revolutionized the economy by placing it on a silver and gold coinage system.
- Trade was extensive, and under the Achaemenids there was an efficient infrastructure that facilitated the exchange of commodities among the far reaches of the empire; Persian words for typical items of trade became prevalent throughout the Middle East and eventually entered the English language; examples are, bazaar, shawl, sash, turquoise, tiara, orange, lemon, melon, peach, spinach, and asparagus.
- codification of the data, a universal legal system upon which much of later Iranian law would be based, and construction of a new capital at Persepolis, where vassal states would offer their yearly tribute at the festival celebrating the spring equinox.

- When a storm destroyed the bridges he had built to cross the Hellespont, he had them rebuilt and for seven days oversaw the crossing of his army, numbering 360,000 troops by modern estimates, supported by more than 700 ships.
- He began an extensive building campaign at Persepolis.
- He killed his brother's family at the queen's demand. He was murdered by members of his court.
- The beginning of the decline of the Achaemenid dynasty.