The first to settle were the Bushmen, great hunters, similar to pygmies in stature and with light brown skin. At the beginning of the sixth century AD, more advanced peoples with black skin, already in possession of metal-working technology, began one of the greatest migrations in history. They were the Bantu, and they came from the north, probably from somewhere near the present day Republic of Cameroon. When they reached what is now Angola they encountered the Bushmen and other groups considerably less advanced than themselves, who they easily dominated with their superior knowledge of metal-working, ceramic and agriculture. The establishment of the Bantu took many centuries and gave rise to various groupings who took on different ethnic characteristics, some of which persist to this day. The first large political entity in the area, known to history as the Kingdom of Congo, appeared in the thirteenth century and stretched from Gabon in the north to the river Kwanza in the south, and from the Atlantic in the west to the river Cuango in the east.