I believe it was Spain. they were the ones who discovered a lot during that time period.
I'm not sure but here are some things europeans take from Africa and I hope this counts
Africans were either captured in warning raids or kidnapped and taken to the port by African slave traders. There they were exchanged for iron, guns, gunpowder, mirrors, knives, cloth, and beads brought by boat from Europe. When Europeans arrived along the West African coast, slavery already existed on the continent.
Through slab-pull and ridge-push.
hope this helps!
The people who lived there generally believed that it was a safer way