Coordinated Engagement

Use this Stratagem in your Shooting phase, before selecting a unit to shoot with. Select one enemy
unit and two sept units from your army that are
within 18" of and visible to that enemy unit.
Until the end of the phase, each time a model in
one of those sept units makes an attack:
•That attack can only target that enemy unit.
•Improve the Armour Penetration characteristic
of that attack by 1.