To form an alliance, a player must declare that he is doing so during the declaration step of his turn.
He must declare (to all players) which warband(s) he wants to ally with and if they agree, the alliance is formed. There is no limit to the number of warbands a player can ally with. The following special rules apply to a warband and its allies:
- Members of allied warbands do not count each other as enemies. Members of a warband may freely run within 8” of members of any warbands they are allied to. Models forced to charge enemy models due to some special rule (such as frenzy or animosity) are not forced to charge allies. However, allied models are to be treated in the same way as friendly Hired Swords, so if an effect says it can charge/shoot a friendly Hired Sword it may hit an allied model.
- Members of allied warbands that are in combat with one another when the alliance is announced will automatically break from combat. Place the models 1” apart from each other. They can move as normal in their next Movement phase (so models knocked down or stunned follow the normal rules for being knocked down or stunned, etc).
- Initiating close combat with, shooting missile weapons at, or throwing non-helpful spells at a member of an allied warband automatically breaks the alliance with that warband. Note that this includes forced charges and attacks. Your allies aren’t going to be as forgiving of such behaviour as your own warband members might be!