- The Smog of War (Unknown Date) - Vectoriums of the Death Guard Legion's 2nd Plague Company, including the Rusted Claws and the Tainted Lung, engage the Iron Hands of Clan Kaargul and Astra Militarum armoured regiments on Tsarvia II. As the grinding tank war starts to turn against them, the Death Guard set light to the sprawling chem-works of Tsarvia Secundus. Malignant Plaguecasters channel the resultant fumes into banks of corrosive smog that wreathe the Death Guard tanks and dissolve the hulls of their Imperial foes. Able to withstand the hideous conditions in a way that their enemies cannot, the Death Guard soon crush Tsarvia II beneath their armoured treads.
The Tainted Lung's Power Armour is the same as that of the Death Guard, composed of decayed and cracked plates of ceramite. The Tainted Lung's Chaos Space Marines, like those of the Death Guard, often wear grotesquely warped suits of antique Mark III Iron Power Armour.
The Tainted Lung's warband badge is usually a modified version of the standard Mark of Nurgle, similar to that used by the rest of the Death Guard.
- Codex Heretic Astartes - Death Guard (8th Edition), pg. 20