Slave trade
It is not clear to what period or what kind of trade you are referring. If it's the trade after the discovery of the Americas the countries most involved were Spain and Portugal and later, England. If it's the transatlantic slave trade, the countries involved were England and the United States, and to a lesser extent Portugal and the Dutch Republic.
triangular trade
One factor was in the early 1800s, European nations began to outlaw the transatlantic slave trade.
The transatlantic slave trade emerged from a variety of factors. The economy of the Americas was heavily dependent on production and export of field crops. The land owners were generally unskilled in hard manual labor, especially in the climate, and remained susceptible to many diseases in the Americas. African slaves were a cheap and hardy labor force. The European countries supplying the populace to the New World needed to ensure economic success for future expansion.
Columbus Day does celebrate racist concepts of discovery, conquest and occupation. They did begin the transatlantic slave trade with captured Indians from Caribbean.
They didn't join, they started the transatlantic slave trade...
European slave traders captured slaves in Africa during the transatlantic slave trade.
african slave trade was a horrible time
the slave trade stoped when Abe was president
The word "transatlantic" says it: it was the trade across the Atlantic ocean from Africa to the Americas.
the Americans
Slave ships during the transatlantic slave trade typically flew the flag of the country that owned the ship, such as Portugal, Spain, England, or the Netherlands.
Slave trade
The Triangular Trade and the Middle Passage.
The transatlantic slave trade.
mamdmd