What happened 664 AD

Psamtik I reunified Egypt and ended the Nubian control of Upper Egypt. Pasmatik also founded the 26th dynasty, client kings established by the Assyrians. Four successive Saite kings continued guiding Egypt into another period of peace and prosperity from 610 to 525 BC.

The international prestige of Egypt had declined considerably by this time. The country's international allies had fallen firmly into the sphere of influence of Assyria and from about 700 BC the question became when, not if, there would be a war between the two states as Esarhaddon had realized that conquest of Lower Egypt was necessary to protect Assyrians interests in the Levant. In 664 BC the Assyrians delivered a mortal blow, sacking Thebes and Memphis. Following these events, and starting with Atlanersa, no Kushite ruler would ever rule over Egypt again.