Rat Swarms

If the majority of the models in a unit are Immune to Psychology, the unit automatically passes any Fear, Panic or Terror tests it is required to make. However, if the majority of the models in a unit have this special rule, the unit cannot choose to Flee as a charge reaction.

Note that this special rule does not make a unit immune to any test made against Leadership not stated here.

A character with this special rule cannot be your General and cannot join a unit without this special rule. A unit with this special rule cannot be joined by a character without this special rule.

A unit consisting of models with this special rule may adopt a Skirmish formation.

If a unit with this special rule loses a round of combat, it is not required to make a Break test. Instead, it will automatically Give Ground as it is pushed back by the enemy. Characters that are not Unbreakable cannot join units that are, and vice versa.

After deployment, units with this special rule may make a Vanguard move. A unit making a Vanguard move moves as described in the Basic Movement rules. It may manoeuvre normally but cannot march.

If both armies contain Vanguard units, a roll-off determines who moves first. The players then alternate moving their Vanguard units one at a time, starting with the player who won the roll-off. Units that make a Vanguard move cannot declare a charge during their first turn.