When the office of satrap became hereditary, it became a threat to the central authority of the Great King. Checks were set up to counter this threat. The satrap's secretary, chief financial officer, and the general in charge of the garrison in the citadel of each satrapal capital reported directly to the Great King in person. In addition, the Median and Persian kings sent out inspectors called the "Eyes of the King" to control and supervise their satraps. | When the office of satrap became hereditary, it became a threat to the central authority of the Great King. Checks were set up to counter this threat. The satrap's secretary, chief financial officer, and the general in charge of the garrison in the citadel of each satrapal capital reported directly to the Great King in person. In addition, the Median and Persian kings sent out inspectors called the "Eyes of the King" to control and supervise their satraps. |