This empire's second ruler was given a name meaning "forceful one" because he seized power during a coup against his brother.  
An essay titled after "al-Maghili's Answers" addresses seven questions from a leader of this empire, advising him to seek legal advice from pious scholars. This empire's second ruler was given a name meaning "forceful one" because he seized power during a coup against his brother.  The scholar Ahmed Babba al-Masufi first worked for this empire, living through its collapse and succession by the Dendi kingdom. A ruler of this empire who captured the city of Djenne persecuted the scholars of the (*) University of Sankore. The eunuch Judar Pasha destroyed mines at Taghaza before defeating Ishaq II and conquering this empire for Morocco at the Battle of Tondibi. This empire's most famous rulers were Askia Muhammad and its founder, Sunni Ali. For 10 points, name this West African empire with capital Gao which succeeded the Mali.
An essay titled after "al-Maghili's Answers" addresses seven questions from a leader of this empire, advising him to seek legal advice from pious scholars.
Songhai Empire [or the Songhay]