Judges 20:44

‘ And there fell of Benjamin eighteen eleph men. All these were men of valour.'

Eighteen military units were destroyed in the initial battle and pursuit, the same number as they themselves had destroyed in the second battle. And all brave fighting men. This latter was probably a boast of the writer as he considered the glorious victory. It was not just nobodies that they had defeated, as was evident by the fact that twice they had defeated armies larger than their own.