Matthew Poole and continuators on Judges 3:2

2 Onely that the generations of the children of Israel might know to teach them war , at the least such as before knew nothing thereof.)

That by the Neighbourhood of such Warlike and Potent Enemies, they might be purged from Sloth and Security, and obliged to inure themselves to Martial Exercises, and to stand continually upon their guard, and consequently to keep close to that God whose Assistance they had so great and constant need of.