[Ivan Van Sertima] hypothesizes that Africans reached America in at least two pre-Columbian stages. The first being ancient Egyptians and Nubians, who reached the Gulf of Mexico between 1200 BC and 800 BC.
The second Theoretical wave, Circa 1310 AD, the Mande/Mende people of Western Africa arrived along eastern Mexico, Panama, Ecuador, Colombia, Peru and various Caribbean islands, some 180 years before Columbus. Although there is indications that other Mende migrations, perhaps in pre-history preceded the 14th Century wave.
Historian / linguist Leo Weiner, in his book, “Africa and the Discovery of America " wrote that Columbus was well aware of the Mandinka [Mandinga/Mande] presence in the “New World, and that the West African Muslims had spread throughout the Caribbean, Central and South America, North America and even into Canada, where they were trading and intermarrying with the ...Indians. "
Africans in Ancient America