And thou shalt hear what they say; and afterward shall thine hands be strengthened to go down unto the host. Then went he down with Phurah his servant unto the outside of the armed men that were in the host. (Judges 7:11)
That is, to the outposts, or sentries. The Midianite camp probably included women and children. Around the outskirts of the camp the armed men would naturally be posted.