Battle of Kado
As Imperial forces (including the Legio Crucius Titan Legion) defended the city from attacking Fiends, Daemonettess, Fire Lords, and Lords of Battle, a hundred Hell-Knights infiltrated the massive underground transport network of the Hive. As the Titans of the Legio Crucius blasted away, felling over 100,000 Chaos soldiers in little under a day, the Hell-Knights sped through the dimly lit tunnels and corridors, eradicating all they encountered. The old fusion-powered trains were destroyed and rumor of the Daemon Knights' passing spread through the hive. On the second day, the Hell-Knights burst into the main streets and destroyed everything they came across, including thousands of helpless civilians. Adeptus Arbites arrived, but these too were crushed and Hell-Knights fought their way back to the surface.
They emerged within firing distance behind the Legio Crucius, and opened fire with their Thermal Cannons. After a single salvo of fire a whole battle group had been destroyed. Among the victims was the Imperator Titan Praeco Deictus.