Editing Hektor Heresy (section)

===Diamat===
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<center>'''FIRST TO FALL'''</center>
[[File:Tiran Osoros.jpg|right|160px]]
The death of Tiran Osoros is usually regarded as the starting point of the Heresy.  Although the Voidwatcher's criminal attack on the Imperial Palace set events in motion, it wasn't until one Primarch murdered another that their brotherhood was sundered and war became inevitable.  It is grimly appropriate that the start of the horrific war between brothers began with the death of the Primarch who had most valued the fraternity of the Military Council.
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''We don't need an inspiring speech.  We are villains, traitors, and murderers.  There's no point in pride or shame about it.''

- Rogerius Merrill, in lieu of an address to his men on the eve of the Battle of Diamat

Far from Ostium, the Primarchs of the Iron Rangers and Scale Bearers would be making errors of their own.  Tiran's fleet emerged from the Warp on the edge of Diamat's system first and plotted a course to the Forge World, intending to take on supplies there.  When the Iron Rangers broke Warp a day later, Tiran was heartened and sent a warm message inviting his brother Primarch to discuss strategy in Diamat's orbit.  Rogerius readily accepted.  As the two fleets cruised into the inner system, they exchanged non-sensitive information.  Warriors who had fought together in campaigns fought by both Legions sent fraternal greetings to one another.  Officers of the Fleets' Victualaries discussed the proper tone for a meeting of the two Legions' dignitaries and decided that it was best to be sombre rather than try to distract from the grim task ahead with false gaiety.

This air of complacency started to come apart as the Iron Rangers fleet neared Diamat.  Tiran had directed his ships into a loose formation, giving ample space for supply shuttles to service the fleet.  Rogerius Merrill had his ships tightly grouped in a cone, a tell-tale battle formation.  The Scale Bearers belatedly asked for clarification and were answered by the Iron Rangers opening fire.  Out of formation and unprepared for the attack, the Scale Bearers took a terrible beating from that first salvo.  Crews were still rushing to their battle stations as a second round of fire hammered Tiran's fleet.  Knowing that they could not continue the fight in space, Tiran Osoros ordered the bulk of his warriors to evacuate their warships and make for the unnamed jungle moon of Diamat while the fleet distracted the murderous Iron Rangers.  After finishing off the Scale Bearers' fleet, Rogerius Merrill closed in for the kill.  His warriors conducted combat drops onto the moon and hunted the Scale Bearers through its jungles.  Though the sons of Tiran Osoros resisted bravely, they were outnumbered and caught in favourable terrain.  Their resistance was broken when Rogerius Merrill slew Tiran, driving many of the surviving Scale Bearers into madness.  The blood shed finally gave a name to the moon of Diamat: ''Sorfall''.

The Iron Rangers did not have long to celebrate their victory.  Onyx the Indestructible's armada, led by the super-battleship ''Mount Everest'', broke Warp shortly after Tiran Osoros' death.  The waves of anguish emanating from Sorfall were sensed by Onyx's Astropaths and on learning their portents and seeing the Iron Rangers fleet among the wreckage of Imperial ships, the Primarch quickly concluded that Rogerius Merrill had committed a foul deed.  Although the Stone Men burned in system at a reckless speed, the Iron Rangers slipped away.  Mighty Onyx could only gather up the survivors of the Scale Bearers and send word to Terra of the madness that had taken place.