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

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

The Spirit of the Lord came on him, so that he became Israel’s judge and went to war. The Lord gave Cushan-Rishathaim king of Aram into the hands of Othniel, who overpowered him.

God chose new leaders when war came to the city gates, but not a shield or spear was seen among forty thousand in Israel.

When the angel of the Lord appeared to Gideon, he said, “The Lord is with you, mighty warrior.”

Jephthah the Gileadite was a mighty warrior. His father was Gilead; his mother was a prostitute.

I have not wronged you, but you are doing me wrong by waging war against me. Let the Lord, the Judge, decide the dispute this day between the Israelites and the Ammonites.”

When their fathers or brothers complain to us, we will say to them, ‘Do us the favor of helping them, because we did not get wives for them during the war. You will not be guilty of breaking your oath because you did not give your daughters to them.’”