The beta version of Battle Brothers is a brand new matched play rule we’d like to test. When we originally wrote this edition of Warhammer 40,000 we wanted to make sure that your army could include appropriate allies. For example, in an Imperium army, Imperial Guardsmen and Space Marines should be able to fight side-by-side, and in a Chaos army Chaos Space Marines should be able to burn the galaxy alongside their daemonic minions. The rules for what units could be included in each Detachment were therefore very relaxed, but this has since led to some very ‘mixed’ Detachments that include units from far more Factions than we originally envisioned. We feel that these esoteric mixed Detachments are far better suited to narrative or open play, and so we have decided to trial this rule for matched play games. This means that you can still include appropriate allies, but now they might need to be included in a different Detachment. There are a few units in certain Index books that would be difficult to include in a matched play army following these restrictions, so we have written errata to enable players to more easily include these units in their army. These changes appear in the appropriate FAQ and Errata documents, but are shown below for convenience.
All of the units in each Detachment in your Battle-forged army must have at least one Faction keyword in common. In addition, this keyword cannot be Chaos, Imperium, Aeldari, Ynnari or Tyranids, unless the Detachment in question is a Fortification Network. This has no effect on your Army Faction.
Edited by Dam13n, 19 April 2018 - 09:35 PM.