Death Guard - Legion Combat Doctrine: When the XIVth Legion was still known as the Dusk Raiders, its Astartes signature strategy had been to attack their foes at nightfall, thus earning them their Legion moniker. The Dusk Raiders' Power Armour was an unpainted slate grey in colour while their right arm and one or both shoulder plates were painted crimson.This was done with the intent to symbolically show their enemies what they truly were -- the Emperor's red right hand, relentless and unstoppable. Many enemies would throw down their weapons the moment the sun dipped beneath the horizon rather than dare to fight them.With the coming of Mortarion, the Legion's combat doctrines changed as the Death Guard became a single instrument of his will. The Death Guard came to believe that victory came through sheer relentlessness. Their weapons, while not ornate, functioned without flaw. They did not manoeuvre in fanciful patterns to confuse the enemy, instead they stood their ground and waited for the enemy assaults to falter before striking back with fatal force.Any environment or situation Mortarion and his advisors could not compensate for, the Death Guard would overcome through sheer stubborn resilience and painful endurance. Mortarion had learned the art of warfare on a world almost covered in mountainous terrain, and even though his innate intellect allowed him to grasp the proper use of tanks and armoured vehicles, the primacy of the foot soldier remained the Death Guard's trademark. Each Space Marine was well-trained in a variety of infantry disciplines, and was able to function in almost any role or environment.The Death Guard were arguably the most remorseless and among the most feared of the Space Marine Legions. This was not simply because of their power in battle or force of arms, but also because there seemed to be no loss they would not accept to ensure eventual victory and no hell they would not endure to reach their foe.Although specialising in entrenched and attritional warfare, the Legion also had a number of formations and tactics that enabled it to operate in concentrated and crushing force in an attack -- one such was dubbed "The Reaping" by those who had fought alongside the Death Guard during the Great Crusade.A heavily reinforced column of attack particularly suited to urban warfare and shattered landscapes, the Reaping was deliberately slow-moving and utterly murderous in its methodical assault pattern and, like the reaper's scythe, little escaped it.After the Death Guard was transformed by the Plague God and turned into a Legion of Plague Marines, they preferred to engage in short-ranged firefights, where they could see the festering wounds inflicted upon their enemies whilst they shrugged off the bolts and las-blasts directed back at them. Their decaying brains are inured to the agony of the bodily corruption that runs rampant in their diseased carcasses, making them all but immune to the pain or discomfort caused by battle wounds.When their enemies close within assault range, Plague Marines make use of their Blight Grenades and release the virulent toxins that they contain, which proceed to eat away at armour and fill the air with thick noxious clouds of blinding, pathogenic spores. The most virulent and flamboyant of these Blight Grenades are made from the severed, decaying heads of their fallen enemies.