He judged Israel That is, he pleaded their cause, and avenged them against the Philistines. In the days of the Philistines That is, while the Philistines had the power and dominion, from which he was not able fully to deliver, but only to begin to deliver them. From this place it is manifest that, in the computation of the times of the judges, the years of servitude or oppression are not to be separated from the years of the judges, but are comprehended within them; which proposition is of great importance for clearing this difficult part of Scripture chronology.
Related Commentaries of Judges 15:20
Judges 15:20
20 And he judged Israel in the days of the Philistines twenty years.