The Second Aeginsine Crusade was launched by the Imperium of Man to reclaim the worlds of the dread Sub-sector Mandragora in 633.M39 after it had been lost from contact with the Imperium for centuries under a pall of Warp Storms. The Red Scorpions Space Marine Chapter gained high honour for their role in the later phases of the Crusade which re-conquered the worlds around the former Sub-sector capital world of Hecuba. These worlds had fallen under the tyranny of a heretical Mechanicus sect based on the once-proud Forge World of Shaehol. It was now a fetid world of chemical swamps and treacherous ash-wastes, its ecosystem wrecked by millennia of unrestrained industry. Shaehol was heavily defended by legions of insane, half-mechanoid servants loyal only to the Dark Magos who had created them