The nineteeth century Jihadist Uthman Danfodio was an Islamic scholar a well as preacher, who sort to cleanse the Hausalands of the atrocities they were engaged in. After he overthrew the Hausa kings of the then Northern Nigeria, he gave flags to his followers who were to carry on his crusade to the other Hausa lands. They wzere believed to be thirteen of them. Please who are they?