Editing Iron Warriors (section)

===Heresy===
As the Iron Warriors ground on, feeding soldiers into meat grinders like an old lady at the Las Vegas slot machines, Olympia became unruly. Eventually, the nobility revolted. After a grueling campaign against the Hrud, this news was taken...less than charitably. Perturabo snapped so hard that he had his Legion assault the world, enslaved the entire population, killed his sister (the only person he ever loved as a family back in Olympia), and founded an "Iron Empire" around it to feed his war machine. To their credit, a few Iron Warriors revolted against the order to '''burn their home and enslave their own people''', only to be shot by the rest of their brethren, while Perturabo himself was secretly glad ''some'' of his sons defied his order. Perturabo feared whatever retribution the Emperor would bring for destroying Olympia, while Horus supported his actions as just and necessary. This seeming act of understanding, mixed with fear and shame was all the leverage Horus needed to bring him on side for the Traitors. The Iron Warriors duly went to Isstvan V and took part in the [[Drop Site Massacre]].

After that, the next step was Phall, where a large chunk of the Imperial Fists fleet was becalmed. To the Iron Warriors this was everyone's birthday and Christmas thrown together, but even though they nearly destroyed the entire fleet, Alexis Polux spoiled the party somewhat by ordering an attack on the ''Iron Blood''. Perturabo himself came under attack by Imperial Fists Terminators, which only helped to turn his paranoia up to 12. The Iron Warriors' most rational commander was also backhanded into a Dreadnought by the Primarch when it emerged that Sigismund wasn't leading the fleet. Soon after, the IV joined the Emperor's Children on a campaign where Fulgrim tried to use Perturabo's life force to ascend to daemonhood. Things were looking like business as usual.

Where the Legion had its biggest successes, they were mostly on the Loyalist side. At Paramar, Kyr Vhalen's loyalist Grand Company met an Alpha Legion force invading their favourite Forge World. The Alpha Legion told them to get with the program. Kyr Vhalen told them "do one" and while Paramar was taken, the Iron Warriors inflicted serious losses on the tricksy bastards and some lived to fight another day. The old Warsmith Barabas Dantioch humiliated his successor at the Schadenhold, and Auric Saxton killed off Lord Commander Iddinam of the Emperor's Children. Later on in the Heresy, Consul-Praevian [[Nârik Dreygur]] and the remnants of his Grand Battalion switched back to Team Imperium during the Battle of Mezoa after getting sick of the Alpha Legion using them as cannon fodder, thus ensuring a loyalist victory.

If any Iron Warrior had hoped for a better fate than being treated as a disposable trench grunt, that hope was dashed as the Heresy grounds on. For example, during the push for the Sol System, the IV<sup>th</sup> legion were ordered to act as the rearguard to cover the Horus's flanks against loyalist legions not otherwise tied down in other fronts or already hunkered down in Terra. As you can guess, having to fight a continuous fighting retreat by yourself leads to a fuck-ton of casualties. One Sons of Horus emissary asked an Iron Warrior commander why he was raiding an enemy trench with his men. He simply said he "Wanted to remind himself that things do not change." This was made worse when said emissary gave an order to Perturabo to take his legion and go fetch Angron and drag him to join the siege that will happen soon. This practically means abandoning their position and a good chunk of the legion alone to hold the line until they die, without the support of their Primarch or the rest of their legion.

As the Heretics drew close to the Sol System, the IV Legion came into its own, crushing fortress after fortress on the world to Terra. Finally the Iron Warriors were having a good time, and it only got better on Terra as they pulled down whole square kilometres of Dorn's works. This lasted right up until Horus told Perturabo to mass everything he had and throw it right at the Mercury Wall in one big concentrated assault. Perty now realized that, for all Horus' flattery and fine words, the Warmaster still expected him to continue with the same kind of wasteful, grinding siege warfare that had caused him and his legion to snap and turn on the Emperor. He immediately threw a bitch fit at the Warmaster about how he was no different from the Emperor, then ordered his legion to down tools and head for the exits. And that was that, at least until . . .