Here are some specific examples of how the Persians treated people they conquered:
* In 539 BC, Cyrus the Great conquered Babylon. He allowed the Babylonians to continue to worship their own gods and to speak their own language. He also allowed the Jews, who had been exiled to Babylon, to return to their homeland.
* In 525 BC, Darius I conquered Egypt. He allowed the Egyptians to continue to worship their gods and to speak their own language. He also built canals and temples to improve the lives of the Egyptians.
* In 521 BC, Darius I conquered India. He allowed the Indians to continue to worship their own gods and to speak their own language. He also built roads and bridges to improve trade and communication in India.