Two years after the fall of the Kisangani station to the Arabs Tippu Tips son Sef held control over much of the Eastern part of todays DRC.  He lived comfortably but was sandwiched between the Leopolds Congo Free State and Germany's East Africa colony.   Ostensibly to quash the slave trade, but to expand his territory and wealth, Leopold retained his orders for his forces to drive East.  War ensued and we shall we see the demise of the Swahili-Arab Empire in the Eastern Congo.