The transatlantic slave trade emerged in the 15th century as European powers explored the Americas. Lasting over 400 years, it forcibly transported millions of Africans across the Atlantic to fuel labor demands in European colonies. Key players included Portugal, Spain, Britain, France, and the Netherlands. West African kingdoms like Benin and Asante were involved, sometimes cooperating with European traders and other times resisting. The trade disrupted African societies and economies while fueling European colonial expansion.