One use only. May be activated at the start of any Round of Combat. Apply the following effects: • Enemy units cannot claim Combat Score bonuses for fighting the Flank or the Rear of the unit. • The unit cannot be Disrupted. • Parry, Shield Wall, and Wall of Iron can be used in any Facing. • For the purpose of Supporting Attacks, all Facings are considered to be the Front Facing (i.e. a model can perform Supporting Attacks also to the Flanks and Rear). • The unit cannot Pursue nor Overrun. The effects last until the unit is no longer Engaged in Combat.