Clash Of Steel

The Clash of Steel was a conflict that occurred eight centuries later, following the destruction of the renegade forge world of Moirae, for preaching unorthodox doctrine that went against the accepted teachings of the Cult Mechanicus. This lamentable event occurred several centuries after the Purification of Moirae, carried out by the Invictors of Mars Space Marine Chapter and their Adeptus Mechanicus allies from Mars. A division from the Invictors encountered a mercenary group believed to have been formed from renegade Iron Hands Space Marines that followed the heretekical doctrine of the Moirae schismatics. The Invictors took immediate action to ensure that the hereteks paid for their folly.

History
The 7th Division fought against a mercenary group named Brotherhood of 100. This group was formed from a company of the Iron Hands believing in the unorthodox teachings of the now-extinct Moirae cult. Inflamed by the sight of the hereteks, the Invictors went into a nearly uncontrollable rage, and their commander ordered their vessel to launch a suicidal charge directly into the heretek's vessel, the Rust Stalker, breaking it in half. The surviving hereteks escaped by drop pod, landing upon the surface of a nearby planet located near their proximity - a forest world - where almost all the heretek mercenaries were captured and made to repent by the unforgiving Invictors Astartes. The remnant that survived was never spotted again.