It happened the same night, that Yahweh said to him, Arise, get you down into the camp; for I have delivered it into your hand.
There was another factor that struck fear into the hearts of the invading raiders.  "The great host of the Midianite enemies contained not only fighting men, but the whole baggage of the army, which had invaded Israel as nomads, with their wives, their children, their flocks and herds, etc."[13]  The seven previous years of uninterrupted plundering had resulted in that extremely vulnerable conglomeration of marauders.