The Massacre of Kormarg was an Imperial military campaign conducted by the morose Star Phantoms Space Marine Chapter against the vile, chiropteran xenos known as the Khrave Marauders on the Fortress World of Kormarg II in 718.M39.
By 710.M39 Kormarg II, a world on the edge of the Sakkara Sector, had been besieged for more than two standard centuries by the Khrave Marauders. Kormarg had held out against the odds and had not fallen, but the world had been laid waste in the process. Taking it upon themselves to answer the defenders' long-standing plea for help, the Star Phantoms' Chapter fleet atttacked en masse, swiftly encircling the Khrave nest-webs in orbit and blasting them apart with concentrated fire from their Bombardment Cannons.
Once they had scattered the remaining enemy snare-ships, the Star Phantoms launched a full drop-strike against the Khrave feasters on the surface, crushing them between the anvil of the extensive Kormarg bastion fortress network and the hammer of the Chapter's Drop Pod onslaught, swiftly annihilating the xenos. As the defenders threw wide their gates to their liberators, however, it quickly became apparent that in their years of struggle against the alien, the human garrison had become genetically and spiritually corrupt. The Chapter Master of the Star Phantoms was swift in his judgement.
With their defences already open to the Space Marines, the Kormargan bastions which had held out for centuries against the xenos became blood-drenched killing chambers as the Star Phantoms purged Kormarg II of its tainted people. After the massacre, the Star Phantoms used the macro-shell craters from the planet's long war as giant pyre-pits for the liquidated population, and the Chapter's Chantry Servitors sang solemn hymns to honour their martyrdom as the Star Phantoms consigned the bodies to the flame. Shortly after the Star Phantoms' actions, Kormarg II was re-garrisoned as a Departmento Munitorum penal colony.
- Imperial Armoury Volume Ten - The Badab War - Part Two, pp. 134-135