Ali II of Bornu

al-Ḥājj Ali III (ʿAlī bin ʿUmar), called Ali Walamma ("Ali, lord of Walam".) Ali's reign appears to have included several long famines, perhaps explainable by strife in the empire hindering the people from cultivating the ground.

Recorded as a skilled warrior, Ali waged several wars against the Sultanate of Agadez in the north. During one of these wars, the Kanem–Bornu capital of Ngazargamu was besieged by a combined Tuareg and Kwararafa army. Ali managed to turn the Tuareg and Kwararafa against each other and then defeated the remaining forces of both. On Ali's return from Mecca after his third pilgrimage he also had to put down an uprising against his rule. Ali may have died on his way back from another pilgrimage to Mecca. He was remembered by nicknames such as the "lion of lions" and was also called "the bird" because he swiftly moved from place to place.

Ali had a long reign, lasting over three decades. He died at Ngazargamu and was succeeded as mai by his son Idris V.