The Atlantic slave trade involved the forced enslavement of millions of Africans to meet labor demands in the Americas, particularly on sugar and tobacco plantations. Initially, the Portuguese focused on gold trade, but as colonization expanded, the demand for African slaves surged, with approximately 9.5 million transported by the 19th century. The journey across the Atlantic was perilous, dehumanizing, and deadly, resulting in significant loss of life during capture and transit.