Before both of those were white slaves brought from Europe (and for this discussion I'm not talking about voluntary servitude). Before that were indigenous Americans enslaving each other.
white slaves: https://www.npr.org/transcripts/90034279
indigenous American slaves: https://www.worldhistory.org/article/1742/native-american-enslavement-in-colonial-america/
It's time to quit entertaining the left's discussion of treating the black slave trade like it was some new thing...even when talking about America.