Sudan is a neighbor of KSA and many non-Arabs and even fellow Arabs are not aware of the depth of the historical relations and the fact that most Sudanese Arabs are actually paternally from modern-day KSA as confirmed by modern-day DNA tests. Skin color here is irrelevant as all it takes is 1 intermarriage with a local Nubian woman.
Sudanese are some of the most kind, warm-hearted and funny people not only in the Arab but Muslim world.
Sudanese Arabic is also very close to Hejazi Arabic.
Even more recent migrations (Rashaida) from Hejaz and later intermarriages of course.
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A completely forgotten people (mostly).
Sudan has a lot of potential. It holds much mineral wealth that is shares with Arabia (Arabian-Nubian Shield)
and it has 84 million hectares of very fertile farmland - one of the most in Africa and globally.