 His son, Kere-Mori, asserted authority but Seku's brother Famaga refused to recognize his claim and so took control over large parts of the northern settlements and operated out of Bobo-Dioulasso.Although there was a significant internal rivalry between the force of Kere-Mori and Famaga they were allied for external purposes.This was most crucial in the 1730 expeditions north of the Black Volta toward the Niger River.