The Persian state at one time was very powerful and huge. Its territories stretched from the Indus River in the east to the Balkan Peninsula in the east. During the reign of Tsar Darius 1, the question arose about the effective management of the state. Thus, an administrative reform was carried out. In this connection, the entire empire was divided into 20 satrapies, each of which was ruled by a local governor – a satrap. Also, each satrapy had a small army to settle the unrest.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.