Related Clues:

• Legendary battlers
• Classic battle participants
• 'The Battle of the ___' (D. W. Griffith film)
• Species subgroups
• Classifies, as kittens
• Battling factions throughout time
• Male and female, whichever way you look at it
• Embellishes, with 'up'
• Prepared to engage?
• They may be determined by sonograms
• Ones in an eternal battle, they say
• Sorts, as with chickens
• Battlers of long standing
• Sorts, as chickens
• Perennial battlers