The Emancipation Proclamation issued by President Lincoln made enslaved African-Americans free once they crossed the border into Northern territory. This eventually freed all former slaves, as the Confederate Army lost the Civil War. This presidential order was issued on the first of January in the year of 1863.
It would be the "Ashanti" people who represent the cultural group that lives in Ghana and is known for its colorful folktales and mythology, although other civilizations in the region share this trait as well.