Answer:
With some early exceptions, Europeans were not able to independently enter the West and Central African interior to capture Africans and force them onto ships to the Americas. Instead, European traders generally relied on a network of African rulers and traders to capture and bring enslaved Africans from various coastal and interior regions to slave castles on the West and Central African coast. Many of these traders acquired captives as a result of military and political conflict, but some also pursued slave trading for profit.