Siege Assault Battle Group – Legiones Astartes















The Siege Assault Battle Group is a substantial boxed set designed to reinforce a Legiones Astartes force with units specialised in breaching fortified positions during the Horus Heresy. Focused on durability, heavy armour, and close-range firepower, this formation reflects the brutal, methodical nature of siege warfare during the later stages of the Age of Darkness.

At the core of the set are Cataphractii Terminators, whose heavy armour and weapon loadouts make them well-suited to advancing under sustained fire. These are supported by an MkIII Breacher Squad, equipped to hold ground and push forward through contested zones, forming a solid infantry backbone. Completing the formation is a Leviathan Dreadnought, providing additional resilience and heavy battlefield presence, well aligned with siege and assault doctrines.

This boxed set includes 23 plastic miniatures, forming a flexible and faction-agnostic core that can be integrated into any Legiones Astartes army. It is suitable for both expanding an existing Horus Heresy force and establishing a strong foundation centred on siege-orientated gameplay and narrative themes.

At the time of writing, the listed price for this set is £109.00.


Included in the Set

  • 6 × Cataphractii Terminators with volkite chargers

  • 6 × Cataphractii Terminators with bolters and power fists

  • 10 × MkIII Breachers

  • 1 × Leviathan Dreadnought

Kit overview:

  • Multi-part plastic miniatures

  • Heavy infantry and siege-focused unit selection

  • Compatible with any Legiones Astartes faction

  • Suitable for large-scale Horus Heresy army builds



Further Reading


— American Civil War Infantry Regiment — Warlord Games — Historical infantry wargaming for Horus Heresy players interested in expanding across systems.

— Scale & Motion Plus — Warhammer and Tabletop Wargaming — The sister site dedicated to Warhammer 40K, Horus Heresy, and tabletop wargaming guides.

Image Credits: Wayland Games / Games Workshop

Affiliate disclosure: This article may contain affiliate links. Purchases made through these links may earn a small commission at no extra cost.

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