Monster

To battle a monster, you must summon on yourself using alchemy, or have a member of your army summon a monster. When you or an army member summons a monster, they may click a button on the page labeled "Call To Arms" which will post a request for help on their wall. Another way to join someone's monster battle (or to invite them to fight your monster), you can send them a direct link to your monster:

* http://apps.facebook.com/castle_age/battle_monster.php?user=

Where you replace (Facebook ID) with the Facebook ID number of the person who summoned the Monster.

Dragons
Everyone fighting a monster may also make a "Call To Arms", and they will also post a request for help on their own walls. When making a "Call To Arms" please note that only army members of the summoner may participate in the fight. If you try to answer your friends "Call To Arms" but are unable to, they may have sent the call on someone else's monster, a person not in your army.