The right answer is the Atlantic slave trade.
The Atlantic Slave Trade took place from the 15th to 19th centuries and was the largest intercontinental migration in world history. Over the course of four centuries, an estimated 25-30 million people were violently ripped from their homelands and shipped abroad causing untold human suffering, and leaving a permanent imprint on culture and society worldwide. Between twelve and 17 million Africans crossed the Atlantic as part of the infamous ‘triangular trade’; many more died on the long forced march to the coast and on board ships to the New World.
