Duarte: Yes, that would be the Transatlantic Slave trade. That is a large number as well, but what often happens in the USA is the Transatlantic Slave trade (European) and its impact today in modern USA politics is always front and center. The Arab-Muslim slave trade started 700 years before the European one and the amount of slaves taken was just as significant. However, the modern USA media does not discuss it nor do many Black Americans discuss it since it would force them to confront, or the ones who embraced say Louis Farrakan's Nation of Islam movement, that the religion of Islam was also imposed on them by an invading Arabs who did enslave untold millions of Blacks from SSA.
Of course some of the Blacks in SSA embraced Islam, without forced conversion, I am sure, but for the ones who didn't, well then slavery was possible when you were from a rival tribe. Mansa Musa from Mali who lived 1280 to 1337 (his name means conquorer) is estimated today by American Economist from sources like (Forbes, WSJ, etc) to be one of the richest men in the world to have ever lived and if he were alive toay, he would be among top 5 richest living today. He conqoured some 24 other Tribes in SSA and acquired all the Gold he could get and Arab accounts, not European sources, document that on a trip to Mali he brought like 12-15,000 Blacks from other SSA tribes/ethnic groups to be sold. In a discussion about Slavery, etc, I pointed this out to a guy on Youtube onetime and I never heard back from him. It destroys the narrative the Europeans did not have willing participants in SSA when the transatlantic slave trade happened. More to the point, Mansa Musa is someone that there is an extensive historical sources on from Arab-Muslims who he traded with and visited on pilgrimages to Mecca and it is clear evidence of Blacks in SSA enslaving other "Black tribes in SSA", not their own people, and selling them into slavery.