West Africa Coast:
Slave trade have been an important source of manpower for sugar plantations in the Portuguese Colony of Brazil, in the Americas since the 16TH century; with their main markets in Accra, Porto Novo, Lagos, Douala and Luanda. African kings themselves had sold slaves to them... slaves that are captured from other tribes and prisoners of tribal wars. Also, they do raids with the Portuguese to capture slaves for them, and the Portuguese have weapons that may kill the strongest African warrior with just one shot.
It's curious that African kings seem unaware of the potential danger that these ports represent, as they continue to fight to the death.
You will play with five tribes (Ashanti, Yoruba, Lunda, Ngola and Kongo) for the control of the West Coast of Africa.