Judges 3:2

Berean Standard Bible (BSB)

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

In context

1 These are the nations that the LORD left to test all the Israelites who had not known any of the wars in Canaan,

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

3 the five rulers of the Philistines, all the Canaanites, the Sidonians, and the Hivites who lived in the mountains of Lebanon from Mount Baal-hermon to Lebo-hamath.

4 These nations were left to test the Israelites, to find out whether they would keep the commandments of the LORD, which He had given their fathers through Moses.

Read the whole of Judges 3

Judges 3:2 in every translation

BSB Berean Standard Bible: if only to teach warfare to the subsequent generations of Israel, especially to those who had not known it formerly:
KJV King James Version: Only that the generations of the children of Israel might know, to teach them war, at the least such as before knew nothing thereof;
WEB World English Bible: only that the generations of the children of Israel might know, to teach them war, at least those who knew nothing of it before:
ASV 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:
YLT 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) —
DBY Darby Translation: only that the generations of the children of Israel might know war by learning it, at the least those who before had known nothing thereof:
WBS Webster 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;)