Battling is like an arena where you can challenge other players to Battles. When you win a Battle, you may steal Gold, and/or Treasures from your opponent. Pick an opponent from the main list or you can pick a fight with your Arch Rivals. Arch Rivals are players whom you have Battled with before.
You can create your own Formation for Battles. You may form different units for both Attack and Defense. A maximum of 5 Followers can be added to your Formation each time. A Formation may not include identical Knights but you can use the same Knight in both the Attack and Defense Formations.