Darius embodies an organizational genius that few ancient or modern leaders can match. He divided the empire into about 20 provinces (called satrapy), which were ruled by local officials (satraps) with minimal interference from their Persian lords.
A province is almost always an administrative unit within a country or state. The term originates from the ancient Roman province, which was the main administrative and territorial unit of the territories of the Roman Empire outside Italy.
The term province has since been adopted by many countries. In some countries where there are no actual provinces, "provinces" is a metaphorical term meaning "outside the capital".
While some provinces were artificially produced by colonial powers, others were formed around local groups with their own national identities.
Many countries have their own powers independent of central or federal power, especially Canada and Pakistan. In other countries, such as China or France, the provinces are established by the central government, with little autonomy.
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