The anger of Yahweh was kindled against Israel, and he sold them into the hand of the Philistines, and into the hand of the children of Ammon.
The text reveals that the Philistines and the Ammonites began to oppress Israel simultaneously from the west and the east respectively. The writer proceeded to narrate the Ammonite account first (Judges 10:8 to Judges 12:7) and then the Philistine (Judges 13:1 to Judges 16:31).