‘So Jephthah passed over to the children of Ammon, to fight against them, and Yahweh delivered them into his hand, And he smote them from Aroer until you come to Minnith, even twenty cities, and to Abel-cheramim, with a very great slaughter. So the children of Ammon were subdued before the children of Israel.'
The details of the battle are brief. Jephthah had been filled with the Spirit of Yahweh and had revealed his dedication by his vow. Thus as far as the writer was concerned Yahweh fought for him and the battle was won. We may, however, consider that he was also greatly helped by having his own trained band of fighting men and an astute knowledge of generalship. The victory was total. He cleared the border of Reuben (Aroer), took town after town (‘ten' would mean ‘a number of' so twenty (ten intensified) probably meant ‘a considerable number of') decimated their army, and swept them out of the land and beyond. Minnith and Abel-cheramim are unknown although Minnith appears to have been famous for its wheat (Ezekiel 27:17) and Abel-cheramim means ‘the meadow of vineyards'. The suggestion may be that he appropriated the richest land of Ammon for Israel, or that he released for Reuben fertile and rich land which had been occupied.
Note the way that Judges 11:29-32 sweep forward. They begin with the Spirit of Yahweh coming on Jephthah, and end with Yahweh delivering the enemy into his hand, with his vow mentioned in the middle. This confirms that his vow was acceptable to Yahweh and militates against it indicating human sacrifice.
‘So the children of Ammon were subdued before the children of Israel.'
The final state of things is described. Ammon, and probably her brother nation Moab, were subdued. They were no longer able to trouble Israel. Yahweh had fulfilled His promised deliverance.