Command sprawling tank formations and master the evolution of the Legiones Astartes' most devastating super-heavy units with Mailed Fist, the newest Journal Tactica expansion for Warhammer: The Horus Heresy. This 48-page softback delivers rich faction history, expanded unit datasheets, and the Leviathan Missions ruleset—designed for large-scale, asymmetrical battles that pit armored might against cunning strategy in multiplayer campaigns.