Judges 3:2

2 (he did this only to teach warfare to the descendants of the Israelites who had not had previous battle experience):

Judges 3:2 in Other Translations

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

2 It was only in order that the generations of the people of Israel might know war, to teach war to those who had not known it before.

2 He did this to teach warfare to generations of Israelites who had no experience in battle.

2 He did it to train the descendants of Israel, the ones who had no battle experience, in the art of war.

2 This was to teach the future generations of the Israelites [how to fight in] battle, especially those who had not fought before.

Judges 3:2 Meaning and Commentary

Judges 3:2

Only that the generations of the children of Israel might know
and teach them war
That is, the following nations were left in the land, that the young generations of Israel might by their wars and conflicts with them learn the art of war, and be inured to martial discipline; which, if none had been left to engage with, they had been ignorant of: besides, their fathers in Joshua's time, as Jarchi and Kimchi observe, had no need to learn the art of war, for God fought for them; they did not get possession of the land by their own arm, and by their sword, but by the power of God in a miraculous way; but now this was not to be expected, and the Canaanites were left among them to expel, that they might be trained up in the knowledge of warlike affairs, and so be also capable of teaching their children the military art; which they should make use of in obeying the command of God, by driving out the remains of the Canaanites, and not give themselves up to sloth and indolence; though some think that the meaning is, that God left these nations among them, that they might know what war was, and the sad effects of it; and the difference of fighting with their enemies alone, as other men, and the Lord fighting along with them, and for them, as he did for their fathers:

at least such as before knew nothing thereof;
being either unborn, or at an age incapable of bearing arms, or learning the art of war.

Judges 3:2 In-Context

1 These are the nations the LORD left to test all those Israelites who had not experienced any of the wars in Canaan

2 (he did this only to teach warfare to the descendants of the Israelites who had not had previous battle experience):

3 the five rulers of the Philistines, all the Canaanites, the Sidonians, and the Hivites living in the Lebanon mountains from Mount Baal Hermon to Lebo Hamath.

4 They were left to test the Israelites to see whether they would obey the LORD’s commands, which he had given their ancestors through Moses.

5 The Israelites lived among the Canaanites, Hittites, Amorites, Perizzites, Hivites and Jebusites.