Choose your side in the eternal conflict with this essential two-book codex bundle featuring Codex: Space Marines and Codex: Chaos Space Marines. Perfect for players who command both loyalist and traitor forces—or who want full insight into the Imperium’s greatest rivalry—this bundle provides the complete rules, detachments, stratagems, and lore for both factions. Whether you’re planning battles from both perspectives, expanding multiple armies, or preparing for narrative or competitive play, this set offers unmatched versatility and value. From the disciplined might of the Adeptus Astartes to the corrupted fury of the Long War’s veterans, this bundle puts the heart of Warhammer 40,000’s greatest conflict in your hands.