The immigrants from England were practicing slavery in England, so they just brought them not noticing anything.
On boats.
Chicago.
Most slaves who were sent to North America came from Africa.
Well this is just a guess but if they were forced to come to America to be slaves, maybe there owners payed for them?
because
Since the US became independent of Britain as a result of the Revolutionary War, Britain did not come to set slaves free in America. It was not until after the Civil War that the slaves were freed by constitutional amendment.
Because they're black
Most of them had been born in America
it came from Africa slaves introduced it to America
originally Africa, then Britain then the british traded slaves for goods
Africa
It was a major center where the slaves from Africa would go in order to come to America.