The armed men - The word is rendered harnessed in Exodus 13:18 (see the note). The most probable meaning of the word is arrayed in divisions or ranks.
Related Commentaries of Judges 7:11
Judges 7:11
11 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 mena that were in the host.