From that date, Egypt moved rapidly towards Arabism, especially in language and culture. A stable Arab bloc began to form on African soil, leaving its clear mark on Sudan. This was because after Egypt's liberation from Byzantine control and the spread of Islam within it, followed by the influx of Arab migrations to Egypt and North Africa, Arabs found a new gateway to Sudan via Bab al-Mandab and the Red Sea.

Arab tribes surged towards Africa, bringing about significant changes in the Nile Valley and North Africa in particular, leading to the political, intellectual, and social connection of these regions with the rest of the Arab world.

Hence, Egypt became the bridge of Arabism and Islam to Sudan, after Arab tribes crossed it from the Arabian Peninsula to Africa. They began to descend upon the good land of Egypt, carrying with them their new message and their Arabic tongue. The arrival of Arab tribes and their migration to Egypt continued, so much so that it can be said that this great Arab wave that came with Islam was not like previous Arab waves that went out to conquer new lands and settle from one place to another, driven by poor economic conditions, population density, or escape from mortal danger. Rather, these were waves carrying new concepts, values, and ways of life, as the Holy Quran calls out to them: "O mankind, indeed We have created you from male and female and made you peoples and tribes that you may know one another. Indeed, the most noble of you in the sight of Allah is the most righteous of you. Indeed, Allah is Knowing and Acquainted."

These were not partial, intermittent waves like the early Arab migrations, which were limited to a specific part of the Nile Valley, or between the two rivers, or on the peripheries of Iraq and the Levant. Therefore, their impact was immense on all that is now called the Arab world, where it became a complete unit. The overwhelming Arab waves eliminated the previous civilizations that prevailed in those regions.