Native Americans were enslaved, then exported

“Native Americans were involved in the slaving enterprise from the beginning of European colonization.  At first they offered captives to the newcomers and helped them develop new networks of enslavement…. As Indians acquired European weapons and horses, they increased their power and came to control an ever larger share of the traffic in slaves.

“In the Carolinas colonists took tens of thousands of Indian slaves and shipped many of them to the Caribbean. In the period between 1670 and 1720, Carolinians exported more Indians out of Charleston than they imported Africans into it….”

— From  “The Other Slavery: The Uncovered Story of Indian Enslavement in America” by Andres Resendez (2016)