Interesting take on history. Around these parts Ottomans captured and sold white slaves ("Slavs") and Caucasian ("from the Caucasus" - not the modern definition) people for transport across the Black Sea to be used in Turkish harems (mostly women and young boys). Ottoman slavery persisted until around WWI. Not a lot of people from African descent involved in this particular slave trade. There's even photos:

https://upload.wikimedia.org/wikipedia/commons/0/0f/Meccan_m...

https://en.wikipedia.org/wiki/Slavery_in_the_Ottoman_Empire#...