What was ancient Egypt?

Ancient Egypt is a time period a long time ago that took place in Egypt. And gets at least 4000 mm of rainfall.
Ancient Egypt was one of the world's oldest civilizations and developed along the Nile River. The Egyptians mustered an incredibly large population for the Ancient Period and the easy navigability of the Nile River made the society unified for most of its existence. Egypt was an autocratic theocracy ruled by the Pharaoh, a king believed to be descended from the Sun God Amun-Re. Egyptians were polytheistic and believed the people took belongings with them into their afterlives.