<Li> Southeastern Africa (Mozambique and Madagascar): 4.7% </Li> <P> There were over 173 city - states and kingdoms in the African regions affected by the slave trade between 1502 and 1853 when Brazil became the last Atlantic import nation to outlaw the slave trade . Of those 173, no fewer than 68 could be deemed nation states with political and military infrastructures that enabled them to dominate their neighbours . Nearly every present - day nation had a pre-colonial predecessor, sometimes an African Empire with which European traders had to barter . </P> <P> The different ethnic groups brought to the Americas closely corresponds to the regions of heaviest activity in the slave trade . Over 45 distinct ethnic groups were taken to the Americas during the trade . Of the 45, the ten most prominent, according to slave documentation of the era are listed below . </P> <Ol> <Li> The BaKongo of the Democratic Republic of Congo and Angola </Li> <Li> The Mandé of Upper Guinea </Li> <Li> The Gbe speakers of Togo, Ghana, and Benin (Adja, Mina, Ewe, Fon) </Li> <Li> The Akan of Ghana and Ivory Coast </Li> <Li> The Wolof of Senegal and the Gambia </Li> <Li> The Igbo of southeastern Nigeria </Li> <Li> The Mbundu of Angola (includes both Ambundu and Ovimbundu) </Li> <Li> The Yoruba of southwestern Nigeria </Li> <Li> The Chamba of Cameroon </Li> <Li> The Makua of Mozambique </Li> </Ol>

What countries were part of the transatlantic slave trade