A unit that contains at least one model with this special rule must declare a Charge if able when they begin the Assault phase within 12" of an enemy unit. If there is more than one eligible target, the controlling player chooses the target of any Charges made. Note that this does not allow models with this special rule to Charge a different unit to one that they made a Shooting Attack against in the previous Shooting phase.
On a turn in which they have charged, a unit containing models with this special rule gains a bonus of +1 to the amount of Wounds inflicted when determining who has won a combat. Additionally, they gain a bonus of +1 to the result of any Sweeping Advance roll they make in a combat that they are on the winning side of. These bonuses do not stack with any other rules that increase the amount of Wounds inflicted when calculating who has won a combat and the result of a Sweeping Advance roll.
Violence Incarnate: On any turn in which a unit with this special rule makes a successful Charge it gains +1 Attack for the remainder of that turn in addition to any other bonuses, even if that Charge is considered a Disordered Charge.
If a unit contains at least one model with this special rule, and that unit is Charged, every model with the Counterattack special rule gains a number of additional Attacks equal to the value in brackets listed as part of this special rule. If no value is listed then the unit gains +1 Attack. If, when Charged, the unit was already locked in combat or has made the Hold the Line Reaction, the Counterattack special rule has no effect.
When a unit that contains at least one model with this special rule takes Morale checks or Pinning tests, the unit ignore any negative Leadership modifiers. If a unit is both Fearless and Stubborn, the unit uses the rules for Fearless instead.
A unit that includes any models with this special rule may not be joined by any model that does not also have this special rule (this includes Legion Techmarines and Legion Apothecaries, which may not be assigned to a unit with this special rule unless they also have this special rule).
