During the Great Crusade, Primarch Perturabo leads a newly raised unit of his Iron Warriors in battle, teaching them the difference between stone and iron – with the Imperial Fists unwitting tutors.
The 33rd Grand Battalion of the Iron Warriors, newly raised and seeing battle for the first time, have the honour of the primarch himself, Perturabo, leading them. But the Hammer of Olympia is there for more than just battle – he is evaluating his new officers and deciding their fates. And with a force of Imperial Fists allied to their cause, Perturabo sees the perfect opportunity to teach his new warriors the difference between the stone of the VII Legion and the Iron of his own.” DRIVE