Basically, Europeans would go to Africa and either enslave the locals by fighting or buy them from local warlords who were locals. They would then take the slaves to their new colonies where they would work until they die or they get sold, like sugar plantations or similar things.
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In think it is the mayflower, but I am not 100% sure.
The joined the Massachusetts Bay colony in 1691
After the pledge of the Allegiance
E.As P increase, Qd will decrease