At the start of up to three of your Command phases, you can select one of the Combat Doctrines listed below. Until the start of your next Command phase, that Combat Doctrine is active and its effects apply to all ADEPTUS ASTARTES units from your army. You cannot select a Combat Doctrine you have already selected this battle, unless a friendly MARNEUS CALGAR model is on the battlefield.
Devastator Doctrine
This unit is eligible to shoot in a turn in which it Advanced.
Tactical Doctrine
This unit is eligible to shoot and declare a charge in a turn in which it Fell Back.
Assault Doctrine
This unit is eligible to declare a charge in a turn in which it Advanced.