For 10 points, name this battle, in which Askia Ishaq II was defeated by Judar Pasha, a 1591 battle that eventually resulted in the destruction of the Songhai Empire.
The losing commander at this battle had just taken control of his country after a viceroy who had previously failed to subdue the Kebbi and quell the Katsina revolt.  The winning commander at this battle was able to maneuver his arquebusiers into place against the opposing forces' cavalry, and the noise of the gunfire and cannon sparked a stampede by the cattle that the losing commander at this battle had hoped to use to as a screening force for his infantry.  The winning side captured the salt mines of Taghaza before advancing to this battle's site just north of the capital of its losing side, Gao.  For 10 points, name this battle, in which Askia Ishaq II was defeated by Judar Pasha, a 1591 battle that eventually resulted in the destruction of the Songhai Empire.
The losing commander at this battle had just taken control of his country after a viceroy who had previously failed to subdue the Kebbi and quell the Katsina revolt.  
Battle of {Tondibi}