When I blow the trumpet, I and all who are with me, then blow you the trumpets also on every side of all the camp, and say, For Yahweh and for Gideon.
Now Gideon first of all was testing to make sure the angel-let me bring out an offering and he saw the miracle there. Then he put out the fleece and now here's the final thing, he slips down and God confirms that once more. And so there are actually three confirmations to the call of God to Gideon.