The English vs Spain war, Eliazbeth I (queen virgin) and Sir Francis Drake defeated the Spanish Armada was how England got into the slave trade business and became the powerful England nation.
Spain controlled the sea boarders, who they got from the Moors, they found them Moorish maps and trade routes that the moors held, that's how Spain were to get into the Americas, from the Moors maps. The Moors were trading with the black folks that were already here in the Americas.
Columbus ships were from the Nino Brothers (I believe) Moors. One of them, thus him bringing over moors to accompany him on his voyage, those were the moors that were speared from the 1492 defeat of the Moors, some moors were kept alive etc.
The English, Queen Elizabeth I defeated Spain and now they were in control of the sea, and they started to branch out into Africa and the exploitation began.