The previous empires in western Asia - the Assyrian and Babylonian Empires were in decline. Persia, by uniting with Media, had superior unified force and was able to capitalise on this decline, taking over western Asia progressively and then central Asia, meeting no unified opposition. They copied their predecessors by leaving/putting in place local administrations, and supervised these through provincial Persian governors. And the king and his council kept overall direction, and the control of internal and external security.
It's takeover by Alexander the Great.
It was taken over by conquest by Macedonia led by Alexander the Great.
Alexander the Great's 10 year military conquest was terminal.
Persia lost the battles of Granicus, Issus and Gaugamela, which led to Alexander's takeover of the Persian Empire.
Establishing internal and external security, encouraging prosperity and establishing 20 provinces with Persian governors to promote and progress this.
Establishing internal and external security, encouraging prosperity and trade, leaving local culture and rulership in place, appointing Persian provincial governors to supervise this.
It's takeover by Alexander the Great.
It was taken over by conquest by Macedonia led by Alexander the Great.
Alexander the Great's 10 year military conquest was terminal.
The Persian Empire led by Cyrus.
Persia lost the battles of Granicus, Issus and Gaugamela, which led to Alexander's takeover of the Persian Empire.
Establishing internal and external security, encouraging prosperity and establishing 20 provinces with Persian governors to promote and progress this.
Athens turned the Delian League which it had led against the Persian Empire into an empire of its own.
Athens turned the Delian League which it had led against the Persian Empire into an empire of its own.
Athens turned the Delian League which it had led against the Persian Empire into an empire of its own.
Athens converted the Delian League, which it had led against the Persian Empire, into an empire of its own.
Athens, which turned the coalition of city-states it had led against the Persian Empire into an empire of its own.