ombat that takes place during boarding actions amid the cold void, or into a breached fortification, can prove lethal beyond even the endurance of the Legiones Astartes. For this reason, specialised formations and wargear have been continually developed to better survive these ‘Zones Mortalis’ since the earliest days of the Great Crusade.

The Breacher Siege Squad is one such unit. Clad in augmented power armour based on the Iron pattern and bearing great ablative shields, these squads act as a vanguard in such lethal missions, and are often additionally equipped with powerful