Related Clues:

• ___ forces
• Opposite camp
• Traitor, e.g.
• __ lines
• The ''other side''
• One to watch out for
• He's not for us
• "Them," with "the"
• Archrival
• ___ territory
• The Joker, to Batman
• Reds, once
• Jets, to Sharks
• Moriarty, to Holmes
• York, to Lancaster