Judges 11:33

And he smote them from Aroer, even till thou come to Minnith, even twenty cities, and unto the plain of the vineyards, with a very great slaughter. Thus the children of Ammon were subdued before the children of Israel.

Cross-reference

Deuteronomy 2:36 Historical context

Deuteronomy 2:36 references the same region (Aroer to Gilead) conquered by Moses—Jephthah's victory reclaims that territory.