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Codex Supplement: Traitor Legions (2016), p118-119 — Sons of Mortarion

Vectoriums are used exclusively by the forces of the Death Guard. The rules below will allow you to organise the models in your Chaos Space Marines collection of miniatures to represent one of these Detachments in your games of Warhammer 40,000.

Choosing an Army

When choosing an army to play a game of Warhammer 40,000, there are two main ways of organising your collection. These are the Unbound method, which means taking whichever units you like, and the Battle-forged method, which is more rigid but has extra benefits. Both are described fully in Warhammer 40,000: The Rules.

If you are using the Unbound method, simply use the datasheets that correspond to the models in your collection. If you are using the Battle-forged method, you will instead need to organise the models in your collection into Detachments. This is a fun process in its own right. The most common of these are the Combined Arms and Allied Detachments.

A Vectorium is a special type of Detachment that can be included in any Battle-forged army. Unlike the Detachments shown in Warhammer 40,000: The Rules, it has a Force Organisation Chart whose slots are a combination of specific Formations and Army List Entries instead of Battlefield Roles. However, it still has compulsory and optional elements, as well as Restrictions and Command Benefits, just like any other Detachment.

Although units cannot normally belong to more than one Detachment, units from a Formation that is part of a Vectorium are an exception. They count as part of both their Formation and the Detachment, and have all associated Command Benefits and special rules. If your Warlord is part of a Formation or an Army List Entry that makes up part of a Vectorium, the entire Vectorium is your Primary Detachment.

Death Guard Vectorium

The Vectorium allows you to represent the typical structure of a Death Guard army on the battlefield. Whether you wish to bring death and destruction with the full might of a Chaos invasion force, or field an elite warband tasked with some dark purpose, the choices below offer a great way to pick your army.

For example, Erik's Chaos Space Marines collection consists of Typhus, a Chaos Lord, a Dark Apostle, a Daemon Prince, four units of Plague Marines, two units each of Chaos Space Marines, Chaos Terminators and Chaos Cultists, one unit each of Raptors and Chosen, a Helbrute, two Heldrakes, a Defiler and two Maulerfiends.

If Erik wishes to organise his collection using the Battle-forged method - as described in Warhammer 40,000: The Rules - all of his units need to be part of a Detachment or a Formation. Erik achieves this by choosing one Vectorium and one Combined Arms Detachment from Warhammer 40,000: The Rules.

The Vectorium in Erik's army consists of two Core choices - a Plague Colony (Typhus and the Plague Marines) and a Chaos Warband (his Chaos Lord, Chosen, Chaos Terminators, Chaos Space Marines, Raptors and Helbrute) - and a Heldrake Terror Pack (his pair of Heldrakes) as an Auxiliary choice.

Erik's Dark Apostle, Daemon Prince, Chaos Cultists, two Maulerfiends and Defiler form a Combined Arms Detachment. As all of his units belong to a Detachment, the army is Battle-forged. Erik chooses Typhus to be his Warlord - his Vectorium is therefore his Primary Detachment. The units that are part of it have the Plague Lord, Disgustingly Resilient and Cloud of Flies Command Benefits, whilst those that are part of the Combined Arms Detachment have the Objective Secured Command Benefit.


This Detachment must include at least one Core choice and one Auxiliary choice. It may include up to four Command choices and any number of additional Core or Auxiliary choices, in any combination. Only the datasheets listed here can be included in this Detachment and all units must have the Chaos Space Marines Faction.

Command Benefits:

Plague Lord: If this Detachment is your Primary Detachment, you can re-roll the result when rolling on the Death Guard Warlord Traits table (pg 116).

Disgustingly Resilient: Units from this Detachment can re-roll Feel No Pain rolls of 1.

Cloud of Flies: If an enemy unit targets a unit from this Detachment that is 18" or more away, the target unit has the Stealth special rule while that attack is resolved.

CoreChaos Warband(pg 46)
CorePlague Colony(pg 70)
CommandLord of the Legion1 of the following:
  • Chaos Lord
  • Sorcerer
  • Dark Apostle
  • Daemon Prince
AuxiliaryThe Lost and the Damned(pg 48)
AuxiliaryHelforged Warpack(pg 49)
AuxiliaryHeldrake Terror Pack(pg 50)
AuxiliaryCult of Destruction(pg 51)
AuxiliaryFist of the Gods(pg 52)
AuxiliaryRaptor Talon(pg 53)
AuxiliaryTerminator Annihilation Force(pg 54)
AuxiliaryFavoured of Chaos(pg 55)
AuxiliarySpawn1-3 units of Chaos Spawn

Command 0-4, Auxiliary 1+, Core 1+