Quite a lot of
Nubian kingdoms, one of it was Kush, once served as a link for trade
and barter because of their topography. They connected the
Mediterranean world and Egypt to the to the Red Sea, as well as to
the inner parts of Africa. Different products and even the beliefs of
participating civilizations streamed forward and backward along the
river for an extremely long period of time. Kerma, which is
considered as the main Nubian kingdom, emerged not long after 2000
B.C.