Charles Ellicott Commentary Judges 11:4

"And it came to pass after a while, that the children of Ammon made war against Israel." — Judges 11:4 (ASV)

In process of time. —The marginal note says, after days, implying the time between Jephthah’s expulsion in early youth and his mature manhood.

The children of Ammon made war. —The fact that this is introduced as a new circumstance, though it has been fully related in Judges 10:8-9; Judges 10:17–18, probably arises from the use of some new, and probably Gileadite, document in these two chapters.