Death Guard - Time of Rotting, M41-M42: Note: All dates from this point forward are provisional due to errors in the Imperial Calendar, meaning these events could actually have occurred at any time from the early 41st Millennium to the early 42nd Millennium.War in the Rift (Unknown Date.M42) - During the War in the Rift between the forces of the rival Chaos Gods, Mortarion decapitates the seven champions of Lybria, turning their skulls into virulent Death's Heads Blight Grenades. These he uses to banish the great Bloodthirster Ka'Bandha back into the Warp, sending him hence with a mocking gift of despoiled skulls no longer fit for Khorne's throne.The Rusthounds Arrive (Unknown Date.M42) - Amidst the ruins of Chambakh, Knights of House Krast battle the mechanised infantry of the Pallid Hand. Shrugging off salvo after salvo of Blight Launcher rounds, the Knights trample the Death Guard and claim victory. Yet in doing so their mechanical steeds are infected with Ferric Blight. What emerges from that festering war zone is a warband of Renegade Knights rusted through in body and soul, limbs shrieking and seized, Thrones Mechanicum tainted beyond recovery. Renaming themselves the Rusthounds, the Knights set off on the hunt for their former allies' souls.Return of the Eisenstein (Unknown Date.M42) - A battered Imperial warship impossibly identified as the long-destroyed, legendary Death Guard vessel Eisenstein is sighted beyond the third moon of Lorn's Landing, glowing with a lambent hue before vanishing without trace. Just solar days later, the Death Guard descend upon Lorn's Landing with Mortarion at its head. Inquisitorial savants note with alarm that this is the sixth such manifestation to herald the coming of the Death Lord himself. They fear what may transpire upon the seventh.Invasion of Medusa (Unknown Date.M42) - Alongside warbands of The Cleaved, The Purge and several other Nurglite Renegade forces, Typhus leads the Death Guard's 1st Plague Company in a shocking raid against the Iron Hands' Chapter Planet, Medusa. The Iron Hands clans drive off their attackers, but not before terrible damage is done, leaving regions of the planet as cursed quarantine zones.Siege of Nebbus (Unknown Date.M42) - As the Death Guard's siege of the Imperial Hive World of Nebbus reaches it seventh standard year, Mortarion's Death Guard Sorcerers summon an ancient evil to aid them. The strange Great Unclean One known as Rotigus joins the fight, bringing with him his appalling aura of infernal fecundity. Protein vats in the hives overflow as the flesh-broth within them grows at an unstoppable pace, burying entire levels under flabby drifts of bloated meat. Vermin of every sort enter frenzied cycles of birth and death, the Imperial defenders finding themselves overwhelmed by tides of sump-rats, infestations of grizzleworms and million-strong swarms of ravenous ripper jacks. Worst of all is the deluge of Nurgle, an endless storm of putrid filth-water that seethes with infectious, bacterial life. Soon enough Nebbus' arid plains become quagmires, then stinking oceans that rise higher and higher. The corpse-choked hive cities flood from the roots upward, their last garrisons fleeing ever higher in search of a salvation that does not exist. Blessed beyond endurance by the plentiful generosity of Rotigus and his daemons, methodically cut to pieces by the thundering guns of the Death Guard, it is almost a mercy when the last of Nebbus' defenders meet their grisly deaths.Tainting of the Minotaurs' Gene-Seed (Unknown Date.M42) - A sepsis cohort of the 7th Plague Company strikes at the fortress-monastery of the Minotaurs Chapter. Their attack is driven off, but celebration turns to despair upon the discovery that Mortarion's sons have tainted the Chapter's gene-seed stocks beyond redemption. So begins a desperate quest for survival, a crusade across the stars to reach Terra and access purified gene-seed reserves before the Chapter wastes away.Battle of Yultah (Unknown Date.M42) - During the Battle of Yultah, Mortarion and his Deathshroud stand unaided in the breach against an entire Necron legion. Death Guard reinforcements fight their way frantically to their lord's side, fearing the worst. Instead they find Mortarion and his last surviving Deathshroud warrior, wounded but triumphant and surrounded by sparking, dematerialising heaps of foes.The Great Brewing (Unknown Date.M42) - Deep within the Imperium Nihilus, the Poisoned Chalice invade the medicae world of Pelucil. They seek to use the planet's macro-alembic complexes to brew the ultimate plague in Nurgle's name.Battle of Hollowfall (Unknown Date.M42) - The Pallid Hand are ambushed by overwhelming Necron forces from the Novokh Dynasty amidst the ruins of Hollowfall. During a fighting retreat, Mortarion's sons infect a number of Necron Warriors with Ferric Blight. Phasing out, the undying android warriors bear the deadly contagion back to the stasis crypts of their Tomb World, beginning an epidemic of catastrophic proportions.Battle of Hesp (Unknown Date.M42) - Vectoriums of the 4th and 7th Plague Companies engage the Tyranids of Hive Fleet Lotan amidst the steaming jungles of Hesp. When the swarms deploy Toxicrenes and Venomthropes to poison the environment, the Death Guard respond with plague spells, Virus Bombs and daemonic diseases. With neither side willing to back down, the atmosphere of Hesp becomes ever more toxic until the jungles, and even the warring armies, are reduced to a gory, bubbling soup. The first Tyranid Hive Ship to taste this poisoned slurry recoils, its proboscis melting, and is bombarded into oblivion by the rest of its fleet. The Jungle World of Hesp is left as an endless sea of toxic slime, too virulent for even the Hive Fleets to devour.Assault on the Writhing God (Unknown Date.M42) - The Space Hulk Writhing God is chosen by the 6th Plague Company, "The Ferrymen," to join Mortarion's Plague Fleets. The Hulk is infested with warring Genestealers and Orks, and so squads of Blightlord Terminators teleport to key points aboard, bearing rune-encrusted plague bombs. Fighting their way through tides of foes, the Chaos Terminators prime their bombs before the survivors teleport back to safety. Thudding detonations shake the Writhing God, disgorging Nurgle's Rot, Greenlung Pox and the Squamous Scourge amidst its warring passengers. Seven solar days later the Death Guard return, wading through deep drifts of rotted corpses to claim the depopulated Space Hulk.Battle of Dysactis (Unknown Date.M42) - During the fyredust season on Dysactis, a vast Death Guard force advances through the pyroclastic storm fronts in search of the Temple of Ascension. They are met amidst the crackling maelstrom by an enormous force of Iron Warriors, supported by corrupt God-machines from the Legio Abhorrax. Continent-shattering battle ensues. Hordes of daemons are summoned from the Beyond to join the fight. Beneath the gaze of the Cyclonead Statues, Mortarion and his fellow Daemon Primarch Perturabo themselves engage in a spectacular duel that lasts for seven solar hours. It is a battle reminiscent of the incredible conflicts of the Horus Heresy, and Perturabo's sons cause terrible damage to the Death Guard force. Yet the longer the fighting rages, the more the contagions and metaliphage poxes of the Death Guard spread through the Iron Warrior ranks. Ancient Heretics sicken and collapse. Malevolent war engines seize with rust and shudder, sparking, to a halt. Machine Spirits go mad with revulsion and pain, and as the powers of entropy and decay run rampant, the battle swings in Mortarion's favour. With his forces in tatters and many of his precious war engines crippled beyond repair, even bitter Perturabo is finally forced to concede defeat. Falling back to pre-prepared defence lines, he detonates a series of explosive trenches amidst the raging storms and disengages in the ensuing mayhem. Badly mauled but triumphant, Mortarion and his Death Guard lay claim to the heathen temple they fought so hard for, and the ancient secrets that lay at its heart.Lynoxis Infested (Unknown Date.M42) - Leading his favoured vectoriums of the 7th Plague Company, Mortarion attacks Lynoxis, an Imperial Ocean World and the Chapter Planet of the Golden Paladins. Timing his attack to coincide with an auspicious sevenfold eclipse, Mortarion has his Biologus Putrifiers and Foul Blightspawn poison the planet's seas. Amidst the resultant apocalypse of disease and filth-encrusted horror, the Death Lord leads his sons to absolute victory, opening up a new outbreak within the shadows of the Imperium Nihilus and spawning a dozen plague-ridden war zones in Imperial space.