The stalwart Solar Auxilia of the 31st Millennium are the finest soldiery among the unaugmented armies of the Imperium, second only to the Space Marine Legions. It is upon their backs that many of the Great Crusade’s successes were built, and in the bloody crucible of the Horus Heresy, they fight in their billions, both for and against the Imperium they helped create.

This book is an essential guide for anyone who wants to command Solar Auxilia armies in Warhammer: The Horus Heresy. It contains the rules you need to field the various troops and war machines of the cohorts, whether they are loyal to the Emperor or the Warmaster. It includes Detachments, Wargear, and special rules which make the Solar Auxilia a unique force on the tabletop.

This 128-page hardback book contains:

• Background and lore: Information on the Solar Auxilia, their organisation, and examples of their forces.
• Rules and unit profiles: A guide to army building, Doctrines, and Detachments, plus rules for units, weapons, and Wargear available to the Solar Auxilia in Warhammer: The Horus Heresy.
• Legiones Auxilia: Rules for using Solar Auxilia cohorts that are bonded to each of the 18 Legiones Astartes.
• Visual showcases: Heraldry markings, colour schemes for infantry and vehicles, and a gallery of stunning miniature photography.