Inside this 208-page hardback book you'll find:

- The Crucible of a Dark Age – A full exploration of the final war for the Garmon Cluster including a detailed timeline of the many battles leading up to that terrible clash a closer look at
the Blackshields and Shattered Legions and details on the Solar Auxilia cohorts who fought alongside the Legiones Astartes.

- Campaigns of The Age of Darkness: The Garmon Bulwark – A full Onslaught Campaign system providing rules for a linked series of games where each victory or defeat builds up to
a final battle. Also included are specific rules to tailor your Onslaught Campaign to the struggle for the Garmon Cluster.

- Age of Darkness: Core Missions – Five Core Missions balanced for both campaign games and Matched Play events. Race to claim vital strongpoints in Sudden Strike adapt to shifting
tides in Strike and Fade or battle for the central ground in The Heart of Battle.

- The Garmon Bulwark: Apex Missions – Two new Apex Missions with extensive special rules intended for campaigns and narrative games. Extract survivors from a mine-strewn
hellscape in Across the Fields of Dead or pit Primarch against Primarch in a Clash Atop the Ghal-Zammad.

- Legiones Astartes: Shattered Legions – Rules for assembling armies of mixed and mingled Space Marine Legions whose behaviour is influenced in different ways by their clashing
doctrines and hybrid tactics.

- Legiones Astartes: Blackshields – Rules for fielding armies and Allied Detachments of Space Marine outcasts renegades and splinter groups from various Legions forged together
into new and often strange warbands.

- Legiones Auxilia and Solar Auxilia – Four new units for the Solar Auxilia including Hermes Light Sentinels and Aethon Sentinels as well as a new Cohort Doctrine plus rules for
fielding Allied Detachments alongside Space Marines – including specific rules for every Legion.

- Legiones Astartes: New Units – Rules for five famous characters from the narrative including Shadrak Meduson and Endryd Haar as well as Command Squads and lower-ranked
Optae officers for any Legion.

- Showcase – Along with atmospheric photography and annotated artwork the book includes a showcase of beautifully painted miniatures for the White Scars Blood Angels Sons of
Horus Shattered Legions and Blackshields.