Zelaya Campaign

The Zelaya Campaign was a successful xenocidal campaign carried out upon the Imperial mining world of Zelaya. The Imperial colonist reported that they had been periodically attacked by undead metallic creatures. Answering their Astropathic calls for assistance, the Astral Leviathans discovered that the mining world was, in fact, a dormant Tomb World. After successfully mapping the subterranean tomb complex beneath the planet's surface, the Chapter commenced with a strategic orbital bombardment which caused the tunnels of the subterranean tomb complex to collapse. This campaign was brilliantly conducted, as no casualties were sustained by either the Chapter or the planet's population.

History
The Astral Leviathans receive a distress signal from a nearby mining colony of the walking dead butchering the populace. Upon further investigation it was discovered that Zelaya was a Necron Tomb World, still mostly dormant. The Astral Leviathans scanned the planet extensively almost completely mapping the vast tomb complexes. With the gathered data the planet's human population was gathered into three defended positions and the Space Marines commenced a strategically planned orbital bombardments designed to crack the planet's surface and collapse a particular set of tunnels trapping the mostly dormant Necrons. After a successful campaign, with no casualties, a Leviathan fortress was established to keep watch over the dormant xenos.