Slavery

 Well over one million whites were enslaved in North Africa between the 16th and 19th centuries, most of them abducted and sold by Muslim pirates. Africans were raiding Europe for slaves for hundreds of years. The school system has totally erased this fact from history.

https://twitter.com/MattWalshBlog/status/1553412651220434944?ref_src=twsrc%5Egoogle%7Ctwcamp%5Eserp%7Ctwgr%5Etweet

https://skeptics.stackexchange.com/questions/47867/were-more-whites-slaves-brought-to-north-africa-than-black-slaves-were-brought-t

"More whites were brought as slaves to North Africa than blacks brought as slaves to the United States or to the 13 colonies from which it was formed. White slaves were still being bought and sold in the Ottoman Empire, decades after blacks were freed in the United States."

https://twitter.com/ThomasSowell/status/1100818613588643840