Aaron³ was a king of the Lamanites near the close of the Nephite record, around A.D. 330. He led an army of 44,000 against the Nephites, who were commanded by Mormon with 42,000. Mormon defeated him and Aaron fled (Mormon 2:9).
In the 350th year the two peoples made a treaty, dividing the lands of their inheritance: the Lamanites and the robbers of Gadianton gave the Nephites the land northward, and the Nephites gave the Lamanites the land southward (Mormon 2:28–29). After ten years of peace the king of the Lamanites sent Mormon an epistle stating that they were preparing to come to battle again (Mormon 3:4). In the renewed war, those who fled to Aaron’s army fell victims to its “awful brutality” (Moroni 9:17).