You mean what the Arabs not the Greeks achieved in Egypt and the rest of North Africa including Sudan.All the other conquerors of Egypt never really had the impact that the Arabs had.History is written by the conquerors. AE is forgotten and distorted by many invasions. The ppl are long gone and their origins disputed. They are truly what it means to be langaab.
A evidence from the past of what a nation can become if it fails to defend it's borders from invasion. To think that this could happen to any country rich in civilisation. It could happen to china to day if it were somehow invade by it's neighbours.
Their origins would be disputed 1000's of years later and many would claim their rich civilisation. I personally hope we reach the highlands some day and achieve what the greeks did in egypt.