HOW TO USE ALLIES (created 07/05/2006)
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Ok, this is for everyone who has questions on the use of allies - for any Imperial army. Daemonhunters, Witch Hunters, Space Marines, and Imperial Guard are all covered here. The first point is to determine which army is going to be the base army and which army will be the allied contingent, as the rules differ depending on which faction is in which position. The possible combinations are:
1) Imperial Guard with allied Daemonhunters AND/OR Witch Hunters
2) Space Marines with allied Daemonhunters AND/OR Witch Hunters
3) Daemonhunters with inducted Space Marines OR Imperial Guard, with allied Witch Hunters
4) Witch Hunters with inducted Space Marines OR Imperial Guard, with allied Daemonhunters
Note: In each section, the allied contingent will be colored blue while the base army will be colored red. This is so that we're perfectly clear what we're discussing. Each section, though, has differing allies & base armies, so just because an army is red in one section doesn't mean it won't be blue in another section. Just read the section relevant to your army and you shouldn't get confused!
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1) If you have a Imperial Guard army, you may include Daemonhunters AND/OR Witch Hunters as an allied contingent. Your base army, in this case IG, can use any units in it's codex as normal, including Doctrines. Once you've taken the mandatory 1 HQ and 2 Troops choices from your base IG army's codex, you may begin to add on allied units from the Daemonhunters, the Witch Hunters, or both.
You may take up to 0-1 HQ, 0-1 Elite, 0-2 Troops, 0-1 Fast Attack, and 0 Heavy Support from each of these allied forces, but you may not have more units than the normal Force Organization Chart (FOC) allows. So while you are allowed an HQ choice from both allies, you cannot use them both - this is because a normal FOC has a max of two HQ choices, and one of them is already used by your base IG army's mandatory HQ choice. Therefore you can add in either a DH HQ or a WH HQ. This repeats for all of the FOC slots: While you may bring in up to 2 DH Troops and up to 2 WH Troops, you're still constrained by the total maximum of 6 Troops choices in a single FOC. If you have 3+ Troops choices from your base IG army, you cannot bring in the max number of allied contingent Troops without violating the FOC rules.
When using allied DH or WH, you may not also use the DH or WH rules for inducting IG or SM units. What this means is that your allied contingent may only include some combination of DH & WH units, and may never include further SM or IG. This prevents lists from ever using IG and SM together!
A point to be aware of is that all allied contingents follow their normal rules for what units may be taken. For example, to use an Assassin (Elite) you also need a DH or WH Inquisitor (Elite) or Inquisitor Lord (HQ). But since you're only allowed a single Elite slot from an allied contingent, you must use an Inquisitor Lord (HQ) to be able to take any Assassin types. Inquisitor Lords require a minimum of three henchmen and cost more than Inquisitors do, making the idea of taking an Assassin in your IG army an expensive proposition. Likewise, you may not combine Daemonhosts and Grey Knights in your allied contingent, as these units are expressly forbidden from ever working together.
Allied contingents and base armies do not share armouries. Your IG characters do not have access to DH or WH armouries, and likewise any DH/WH characters cannot buy items or weapons from the IG armoury.
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2) If you have a Space Marine army, you may include Daemonhunters AND/OR Witch Hunters as an allied contingent. Your base army, in this case SM, can use any units in it's codex as normal, including Traits. Once you've taken the mandatory 1 HQ and 2 Troops choices from your base SM army's codex, you may begin to add on allied units from the Daemonhunters, the Witch Hunters, or both.
You may take up to 0-1 HQ, 0-1 Elite, 0-2 Troops, 0-1 Fast Attack, and 0 Heavy Support from each of these allied forces, but you may not have more units than the normal Force Organization Chart (FOC) allows. So while you are allowed an HQ choice from both allies, you cannot use them both - this is because a normal FOC has a max of two HQ choices, and one of them is already used by your base SM army's mandatory HQ choice. Therefore you can add in either a DH HQ or a WH HQ. This repeats for all of the FOC slots: While you may bring in up to 2 DH Troops and up to 2 WH Troops, you're still constrained by the total maximum of 6 Troops choices in a single FOC. If you have 3+ Troops choices from your base SM army, you cannot bring in the max number of allied contingent Troops without violating the FOC rules.
When using allied DH or WH, you may not also use the DH or WH rules for inducting IG or SM units. What this means is that your allied contingent may only include some combination of DH & WH units, and may never include further SM or IG. This prevents lists from ever using IG and SM together!
A point to be aware of is that all allied contingents follow their normal rules for what units may be taken. For example, to use an Assassin (Elite) you also need a DH or WH Inquisitor (Elite) or Inquisitor Lord (HQ). But since you're only allowed a single Elite slot from an allied contingent, you must use an Inquisitor Lord (HQ) to be able to take any Assassin types. Inquisitor Lords require a minimum of three henchmen and cost more than Inquisitors do, making the idea of taking an Assassin in your base SM army an expensive proposition. Likewise, you may not combine Daemonhosts and Grey Knights in your allied contingent, as these units are expressly forbidden from ever working together. The only exception to these rules are the combination of Grey Knights, Sisters of Battle, and Space Marines. Normally the two former unit types may never work with the latter. But when your base army is Space Marines, you may include GK, SoB, or both - the rules preventing GK & SM or SoB & SM only apply if the GK or SoB are in the base army, not allied in.
Allied contingents and base armies do not share armouries. Your SM characters do not have access to DH or WH armouries, and likewise any DH/WH characters cannot buy items or weapons from the SM armoury.
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3) If you have a Daemonhunters army, you may include inducted Imperial Guard OR Space Marines, and you may include allied Witch Hunters. Your base army, in this case DH, can use any units in it's codex as normal. Once you've taken the mandatory 1 HQ and 2 Troops choices from your base DH army's codex, you may begin to add on units from other codices:
Inducted IG or SM: You can add on limited units from one or the other of these, but never both. The exact units allowed are listed in the DH codex (pages 30-31). These units occupy a Force Organization Chart (FOC) slot like any other unit does. Certain units have restrictions on when they may be used: An inducted IG Leman Russ, for example, requires that you have already fielded two or more inducted IG Troops choices first. They also have limits on how many may be used: that inducted IG Leman Russ is a 0-1 choice.
Allied Witch Hunters: You may take up to 0-1 HQ, 0-1 Elite, 0-2 Troops, 0-1 Fast Attack, and 0 Heavy Support from the Witch Hunters, but you may not have more units than the normal Force Organization Chart (FOC) allows. So while you are allowed an HQ choice from WH, you cannot use it if you already have two DH HQ choices - this is because a normal FOC has a max of two HQ choices. This applies for all of the FOC slots: while you may bring in up to 2 WH Troops, you're still constrained by the total maximum of 6 Troops choices in a single FOC. If you have 5-6 Troops choices from your base DH army, you cannot also bring in the max number of WH Troops without violating the FOC rules.
You may not include inducted IG or SM in the allied WH contingent. This means that the only inducted units allowed are those belonging to the base DH army. You may never have IG and SM in the same FOC, basically, nor may you get around 0-1 limitations by taking inducted IG or SM twice.
When using inducted Space Marines AND allied Witch Hunters, you may include Sisters of Battle in the allied contingent - the rule preventing SM and SoB from serving together only applies if the Sisters of Battle are in the base army, not allied in.
Allied contingents and base armies do not share armouries. Your DH characters do not have access to WH armouries, and likewise any WH characters cannot buy items or weapons from the DH armoury.
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4) If you have a Witch Hunters army, you may include inducted Imperial Guard OR Space Marines, and you may include allied Daemonhunters. Your base army, in this case WH, can use any units in it's codex as normal. Once you've taken the mandatory 1 HQ and 2 Troops choices from your base WH army's codex, you may begin to add on units from other codices:
Inducted IG or SM: You can add on limited units from one or the other of these, but never both. The exact units allowed are listed in the WH codex (page 26). These units occupy a Force Organization Chart (FOC) slot like any other unit does. Certain units have restrictions on when they may be used: An inducted IG Leman Russ, for example, requires that you have already fielded two or more inducted IG Troops choices first. They also have limits on how many may be used: that inducted IG Leman Russ is a 0-1 choice.
Allied Daemonhunters: You may take up to 0-1 HQ, 0-1 Elite, 0-2 Troops, 0-1 Fast Attack, and 0 Heavy Support from the Daemonhunters, but you may not have more units than the normal Force Organization Chart (FOC) allows. So while you are allowed an HQ choice from DH, you cannot use it if you already have two WH HQ choices - this is because a normal FOC has a max of two HQ choices. This applies for all of the FOC slots: while you may bring in up to 2 DH Troops, you're still constrained by the total maximum of 6 Troops choices in a single FOC. If you have 5-6 Troops choices from your base WH army, you cannot also bring in the max number of DH Troops without violating the FOC rules.
You may not include inducted IG or SM in the allied DH contingent. This means that the only inducted units allowed are those belonging to the base WH army. You may never have IG and SM in the same FOC, basically.
When using inducted Space Marines AND allied Daemonhunters, you may include Grey Knights in the allied contingent - the rule preventing SM and GK from serving together only applies if the Grey Knights are in the base army, not allied in.
Allied contingents and base armies do not share armouries. Your WH characters do not have access to DH armouries, and likewise any DH characters cannot buy items or weapons from the WH armoury.
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Other Questions/Important Points:
Q: How can I use an Assassin in my Imperial Guard or Space Marine army?
A: You must first buy an Inquisitor Lord from either the Daemonhunters or Witch Hunters armies. Inquisitor Lords are HQ choices, and require a small unit of henchmen to be a legal choice - making them fairly expensive, as well as occupying a valuable HQ slot.
Q: Can I ever have SM and IG in the same army through allies?
A: Nope! While DH and WH may always be present in the same force, IG and SM may not be together. The only way to field both Space Marines and Imperial Guard is to use multiple Force Organization Charts (FOCs) - one for Guard, one for Marines. Each chart would require the mandatory 1 HQ & 2 Troops choices for whichever army occupies it, making the use of multiple FOCs not an option in smaller games. Using multiple FOCs also requires your opponent's permission.
Q: But I thought that Grey Knights/Sisters of Battle couldn't be in the same army as Space Marines?
A: The rules for this exclusion only apply when Daemonhunters or Witch Hunters forces are the base armies and you're attempting to use inducted Space Marines. When SM are the base army with allied DH/WH, there is nothing preventing you from using Grey Knights or Sisters of Battle units.
Q: With a base DH or WH army and inducted SM or IG, may I use Doctrines/Traits?
A: Nope! SM or IG choices used in this situation must come from the very limited lists in the back of the DH and WH codices, with no modifications beyond the normal armoury access/squad weapon upgrades allowed. If you want Doctrines or Traits, you must use your IG or SM force as the base army with allied DH/WH - see parts #1 & #2 for rules on how that works.
Q: Can my DH or SM Teleport Homer be used with friendly WH or IG units? Improved Comms? Holy Relic?
A: Yes. A Teleport Homer (or any similar type of wargear) can be utilized by any friendly model in your army. If you have a Space Marine army with Teleport Homers in it, and you have allied Grey Knights, for example, the GK may utilize the Teleport Homer's effects. This is the same with any item that effects all friendly models: Holy Relic (DH), Improved Comms (IG), etc.
Q: Can I have a base Daemonhunter or Witch Hunter army with allied Space Marines or Imperial Guard?
A: Nope. Only the two Inquisition armies have legal rules for being used as allies. Technically, inducted IG or SM do not count as allies, but count instead as part of the base DH or WH army itself, so the only Imperial armies that can ally themselves to another are DH and WH (and the Xenos Hunters, if GW ever publishes their codex).
Q: Are allies tournament legal?
A: This is a bit less clear than the other issues above. Technically the use of allies, as long as their in legal combinations (ie, the four combinations detailed in this guide), are tournament legal. I myself have encountered GW-sanctioned tournaments that refuse to allow them though. The best route to go is to check with tournament organizers beforehand. On a related note, inducted IG or SM units in your base DH or WH army should also be 100% tournament legal, but the same situation applies: some tournament organizers have differing ideas. Either way, check before the day of the event to be on the safe side!
Q: Can I use specific Marine Chapters (Space Wolves, Black Templar, etc) or Guard Units (Catachans, Steel Legion, etc) with DH/WH?
A: It depends on who is the base army.
* If your base army is going to be the Marine or Guard force, then yes, you may use a specific Chapter or Unit of that army, as normal. Having allied DH or WH units does not effect that.
* If your base force is going to be Daemonhunters or Witch Hunters, with inducted IG or SM, then no, you may not use a specific IG or SM army's rules. Both the DH and WH codices specifically forbid Traits and Doctrines from being used, including the previous edition's incarnations of this (as of right now, the old Marine chapters do not use Traits, but they still count as Traited marines for this purpose. Same with old Guard units). You *may* use the models of these different armies to *represent* your inducted vanilla Marines or vanilla Guard, but none of the special rules, units, wargear, etc that go with them. So you may use Spacewolf models to represent a squad of inducted Marines in your base DH or WH army, but those Spacewolf models must act in all ways like stock-standard Space Marines from the current SM codex.