Editing The Cleansing of Calverna (section)

==Background==
{{See also|Unification Wars (Hektor Heresy)}}

The origins of the Calverna Techropolis are wrapped in mystery.  Fragmentary references to the complex can be found in surviving documents from the Age of Strife, but the usual problems with this source persist.  Even the Imperial situation report, preserved in the archives of the War Scribes with their customary fastidiousness, is lacking in significant historical perspective.  What is known is that Calverna had become a heavily fortified outpost, held by but a single man.  If it seems surprising that the Emperor would commit his Adeptus Astartes to fight a lone recluse, it must be mentioned that the Arch-Maniac of Calverna was far from an ordinary man.  Whether by accident or design, the Arch-Maniac had been transformed into the central intelligence of the Techropolis.  His brain and nervous system no longer addressed the needs of his body, but instead controlled a small army of mechanical soldiers backed up by automated turrets and other defences.  For centuries, Calverna had claimed victim after victim as unwary men entered its nightmarish halls in pursuit of ancient technology.

But now, Calverna's secrets would be sought by warriors who were far more than men.  The Emperor was determined to gain access to the Techropolis's secrets - indeed, he had initially slated [[Hektor Cincinnatus]]'s [[Heralds of Hektor|First Legion]] for the action.  However, the Primarch's exemplary campaigns in Hy Brasil suggested that a change of plans might be in order.  Orend Ymoro's men of the recently-activated Second Legion had displayed a considerable knack for fighting in the mayhem of hive and tunnel actions during the Merican campaign.  In His wisdom the Emperor decided that this achievement qualified the Second Legion for the honour of spearheading the invasion of the Calverna Techropolis.