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

American Standard Version
only that the generations of the children of Israel might know, to teach them war, at the least such as beforetime knew nothing thereof:

Berean Study Bible
if only to teach warfare to the subsequent generations of Israel, especially to those who had not known it formerly:

Douay-Rheims Bible
That afterwards their children might learn to fight with their enemies, and to be trained up to war:

English Revised Version
only that the generations of the children of Israel might know, to teach them war, at the least such as beforetime knew nothing thereof;

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

World English Bible
only that the generations of the children of Israel might know, to teach them war, at the least such as before knew nothing of it:

Young's Literal Translation
(only for the sake of the generations of the sons of Israel's knowing, to teach them war, only those who formerly have not known them) --

Judges 3:2 Additional Translations ...