Answer:
criminals, debtors, and captives in war.
Explanation:
During the slaves' trade, particularly during the transatlantic slaves' trade, many Africans, specifically those wealthy ones and of royal families, participated in the then lucrative slave trade. Many of the African slaves used in the exchange for foreign goods were "criminals, debtors, and captives in war."
Hence, Slaves, in the traditional African example, tended to be "criminals, debtors, and captives in war.