Encirclement then Extinction Languages, and the Arabic language had become • The Arab migrations with the advent of Islam led to the encirclement and then extinction of previous languages. This is because researchers link ancient Arab relations and Arab regions to political and natural conditions. This is because during periods of abundant rainfall in the north of the Arabian Peninsula, conditions stabilized and trade flourished. However, during periods of drought, when conditions became unstable, trade became impossible. In many cases, drought was linked to the temptation of Bedouins to invade Egypt, especially from its north. This also led to crossing the Red Sea and spreading into the regions of eastern Sudan. Similarly, relations intensified with the southern Red Sea region, whether in the south or north of the Arabian Peninsula. It appears that the climate crisis that the Arabian Peninsula witnessed before Islam reached its peak in the sixth century BC. However, this does not mean that Arab expansion in the early Islamic eras was due to the aforementioned drought, because the expansion here is different, due to the participation of the Canaanites, Arameans, and other Semitic peoples. But the tribal migrations at that time were a starting point for the principle of spreading the Islamic faith and liberating lands occupied by the Byzantines and then moving south into the land of Sudan. • The appearance of the light of Islam was what gave those migrating Arab tribes spiritual and intellectual support, as Arabs flowed in large numbers until they reached the gates of Nubia and Naj'a. With ease, simplicity, and convenience, which lasted for centuries, the Arab migrants opened up to the indigenous groups of Beja and Nubians, lived with them, and mixed with them through intermarriage. They even introduced the system of inheritance through the mother until they established themselves and their sons assumed leadership positions in their society. Consequently, the Nile Valley Sudan, due to its close connection with Egypt, had a great impact, as Islamic influences entered from Egypt through the land of Nubia.