You are refering to Middle Passage slave trade right?
It started around 1440. For two hundred years slave trade was monopolized by Portuguese It is hard to estimate how many people were kidnapped form Africa, but it is estimated that around 6 million were transported in eighteenth century only.
in America it started 1808 and ended 1865
The transatlantic slave trade, including the Middle Passage, began around the year 1500. Initially dominated by the Portuguese, millions of Africans were forcibly transported to the Americas during this period. The trade significantly impacted both African societies and the development of the Americas.
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