The war that unfolded on Tallarn during the Horus Heresy was on a scale nearly impossible to comprehend, a conflict lasting a full year with relentless battles on a thousand fronts, where entire Titan Legios collapsed and the ranks of the Imperialis Auxilia were obliterated.

This 128-page book contains a comprehensive story of the Destruction of Tallarn and the Fall of Sapphire City, significant events in the vast and nightmarish Tallarn campaign. In addition to detailing the Loyalist and Traitor forces involved in these engagements, the book includes new Formations and Detachment Data Sheets for the Legiones Astartes and Solar Auxilia Army Lists.

This supplementary book presents a complete campaign system for linking the battles of the Legions Imperialis, including Breakthrough Campaign rules where you can directly assault the strongholds of your opponents, as well as an expansion of this system that allows players to fight for the battles in the Northern Desolation. The book contains rules for Legions Imperialis battles within the thick toxic clouds that shrouded the battlefields of Tallarn, allowing you to bring to life the intense and suffocating conditions of this war-torn planet on the tabletop. You will also find rules for Spearhead games with unique missions for massive armored columns – perfect for representing the unusual conditions on Tallarn.

To use the content of this book, ownership of a copy of Warhammer: The Horus Heresy – Legions Imperialis Rulebook is required, which is available separately.