Thematic Bible: Some of, left to prove israel

Now these are the nations which the LORD left, to test Israel by them (that is, all who had not experienced any of the wars of Canaan; only in order that the generations of the sons of Israel might be taught war, those who had not experienced it formerly). These nations are: the five lords of the Philistines and all the Canaanites and the Sidonians and the Hivites who lived in Mount Lebanon, from Mount Baal-hermon as far as Lebo-hamath.