The Battle of Fatagar (alternatively known as Nech Sar) was a reprisal war between the participants of the previous Adal Sultanate and Ethiopian Empire in the Ethiopian-Adal war. It was fought between the forces of the Sultanate of Harar led by Nur ibn Mujahid, and the Ethiopian Empire under Emperor Gelawdewos. The Ethiopian Emperor was killed by Adal forces in this battle.