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.
These verses really introduce the judgeships of Jephthah, Ibzan, Elon, Abdon, and Samson (Judges 10:8 to Judges 16:31). Another possibility is that since the introductory formula in these verses is not strictly a sequence indicator, the judgeship of Jephthah may have overlapped Gideon’s somewhat.