By the 6th century BCE, the Persian Empire was the largest the world had ever seen. What strategies did Persian kings develop to help them govern such a massive empire? Describe at least two of these

By the 6th century BCE, the Persian Empire was the largest the world had ever seen. What strategies did Persian kings develop to help them govern such a massive empire? Describe at least two of these governing strategies and explain how they benefited Persia. Be sure to support your conclusions with clearly organized historical evidence.