There was a time before the advent of modern, hygienic warfare that men went to battle wearing whatever they could strap to themselves to prevent the enemy from breaching their integumentary hulls and carrying whatever they thought might breach their enemies'. How did it work? How were  battles actually fought? How could anyone tell who was fighting, or who won? What I know about battle makes it seem that every ancient military victory was nothing more than propaganda, because if you couldn't tell one side from another, the first guy to yell "I win" must have won.