For what purpose did Darius divide the state into satrapies?

This innovation was made in order to increase the efficiency of government administration. At that time, the Persian Empire was huge. Its territories stretched from the Balkans to the Indus River. It would be difficult for a single king to rule such vast lands. Thus, an administrative reform was carried out, which divided the empire into satrapy. These satrapies were to be ruled by local governors – satraps.

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