Voltemond is described in "Ghostmaker" as a temperate world, similar to Earth, with extensive marshlands around Voltis City, the planetary capital, which was under Chaos control before the events of "Ghostmaker". The chapter begins with the Tanith First "Gaunt's Ghosts" saving the Ketzok 17th "Serpents" artillery regiment from an ambush by Chaos Space Marines. The Tanith are then ordered to infiltrate and assault the main water-gate and sanitation outfall of Voltis to mine the walls and form a breach for an assault by the Royal Volpone 50th storm troopers, known as the "Bluebloods". The assault on the water-gate is repelled when the traitors open the floodgates and flush the Tanith out; however, Sergeant Cluggan leads a successful attack on the sanitation outfalls, creating a breach for the armoured assault. As the Ghosts withdraw, General Noches Sturm of the Royal Volpone and his adjutant, Major Gilbear, both of whom were disdainful of Gaunt and his "low-born" soldiers, order the Ketzok to bombard the Tanith as they fall back to their base. Three hundred men, including Sergeant Cluggan, are killed and another two hundred wounded. Gaunt almost faces a court-martial when he punches Colonel Ortiz, the Ketzok commander, but is let off when Ortiz claims that his injuries were caused by his Basilisk artillery vehicle's recoil. He proceeds to level a threat at General Sturm.