Fresh from a victory against Nambu a Ngongo a 20,000 strong Portuguese army with its Imbangala allies entered Mbamba and was met by the Duke at Mbumbi .
Nambu a Ngongo is a southern neighbor of Kongo .
Fresh from a victory against Nambu a Ngongo , a southern neighbor of Kongo , a 20,000 strong Portuguese army with its Imbangala allies entered Mbamba and was met by the Duke at Mbumbi .