Egypt, something BC: Stuff happens and Egyptian Empire falls. More stuff happens.
North Africa, around whatever time PCS, EB, and all of that exists: A court-marshaled military general of Egyptian descent discovers his true heritage. He convinces the people of Egypt (then living in poverty) to join him and they will lead a better life. Sevral years later a new army emerges, led by the court-marshaled general, Nero-Amkhep. They call themselves Ægyptron (pronounced A-jipt-ron), and they are here for conquest.