The Iron Warriors, the 4th Legion of the Emperor’s mighty Space Marines, stand as the grim heralds of siege and destruction, forged under the cold brilliance of their Primarch, Perturabo. Masters of siegecraft, they were the Emperor’s unrelenting fist, tearing down enemy strongholds with methodical precision and iron discipline. Where others sought glory, the Iron Warriors found purpose in the cold grind of attritional warfare, conquering fortresses through overwhelming firepower and sheer endurance. Yet, despite their triumphs, they were often cast into the shadows, uncelebrated for their sacrifices, fueling a deep resentment that festered within the hearts of the Legion. Their bitterness grew with each thankless task, their loyalty tested by the Emperor’s seemingly indifferent gaze, while their rivals, like the vaunted Imperial Fists, basked in the light of praise.
When Horus, the Warmaster, called for rebellion, it was this unrelenting bitterness that led Perturabo and his warriors to cast off their chains of loyalty and bring their siegecraft to bear against the Imperium itself. In the dark days of the Horus Heresy, the Iron Warriors laid waste to fortifications once considered impenetrable, their hammers breaking the gates of the Emperor’s own Palace during the Siege of Terra. Now, as traitors within the Eye of Terror, they serve as masters of destruction, their cold, mechanical hearts dedicated to tearing down the walls of both Imperial and heretical worlds alike. Perturabo, now ascended to Daemon Prince, leads his Iron Warriors in an unending crusade of vengeance, where every fortress must fall, and every defense is crushed beneath their iron heel.