@aurochs@mastodon.social heck, Cervantes even spent five years in Algiers after he was taken prisoner by barbary pirates. During his captivity, he had to do forced labor, so he was a slave himself!
https://www.bbc.com/culture/article/20160421-when-cervantes-was-captured-by-pirates
As an additional note, the first black free settlement in the Americas was Ft Mose, not far from St. Augustine, FL. It was promoted by the Kingdom of Spain in 1693
https://en.wikipedia.org/wiki/Fort_Mose_Historic_State_Park
https://en.wikipedia.org/wiki/Francisco_Men%C3%A9ndez_(black_soldier)