In 520 BC where did the Persians conquer and who had been living there?

In 520 BC, the Persians, under the rule of Darius I, conquered the region of Egypt. Prior to the Persian conquest, Egypt had been inhabited by the ancient Egyptians, who had a rich culture and history, having established one of the world's earliest civilizations along the Nile River. The conquest marked the incorporation of Egypt into the Persian Empire, which significantly influenced its administration and culture.