- A Disciplinary Officer, informally known as a member of the Chapter Military Police, are specialist political officers -Consuls- of the Legiones Astartes. While the Codex Astartes has rendered the Consuls absolete, the Imperial Fists Legion and their successors are the exception and employ them still post Horus Heresy.
- As members of the Discipline Corps of the Imperialis Militant they are empowered to use any means necessary to ensure the Law is enforced in both their Legion and their Imperial Guard allies.
- This includes overriding any rules of engagement and deploy special methods to punish enemy perpetrators, reminding to their brothers and allies the fate that awaits all heretics.
- Requires Siege Control and the Advanced Siege Control Research. Not available with the Crimson Fists WC.
- Effective against Infantry and Commanders.
- Fanatically Stubborn: Difficult to break; even broken Imperial Fists do not retreat, but fight harder to the last man. (Requires Siege Control.)