en_tn/jdg/03/02.md

He did this to teach warfare to the new generation of the Israelites who had not known it before

This breaks from the main story line. The narrator gives background information about why Yahweh left some of the people groups in Canaan. Alternate translation: "Yahweh left nations among the Israelites to teach the young men who had not fought in battle before how to fight" (See: rc://en/ta/man/jit/writing-background)