Ghazghkull Mag Uruk Thraka - Third War for Armageddon: During the fifty seven standard years following the Second War for Armageddon, Ghazghkull regrouped his forces, and reassessed his strategy. Remembering his defeat at Hades Hive on Armageddon over five decades earlier, he was not eager to repeat his mistake. He intended that Hades Hive would be one of the first places to fall. In light of its importance to the Imperium, Armageddon's defences were overhauled after Ghazghkull's first invasion nearly overwhelmed the planet. The star systems surrounding Armageddon were now heavily fortified. New naval stations and orbital defence platforms gave Armageddon a level of protection bettered only by Terra and a few others in the whole of the Imperium. Against the WAAAGH! that Ghazghkull unleashed, this didn't matter. With a grinding inevitability, Ghazghkull's junk-laden armada ploughed into realspace and advanced. In their wake, they left devastated planets as they steered towards Armageddon. Imperial task forces that sallied out to intervene were swallowed whole, never to return. In rightful panic, the distress call went out -- asking for reinforcements before the Orks could reach Armageddon.On the day of the Feast of the Emperor's Ascension, fifty-seven Terran years to the day after his first invasion, Ghazghkull returned. The orbital battle over Armageddon raged for two fiery nights, but by dawn of the third solar day the skies were filled with the vapour trails and the incandescent afterblaze of Ork dropships. In a roaring wave behind them came swarms of atmospheric fighter craft and swooping bomber jets. Ghazghkull chose not to fight at Hades Hive, that indomitable high water mark where his last invasion broke itself. This time, there would be no such defiance. In an act of terrible vengeance, giant asteroids aimed by orbiting space hulks smashed the entire hive apart, annihilating its inhabitants and its defenders. This was but a prelude to the bloodshed that would follow.Ground-based Defence Lasers and missile platforms reaped a horrific toll upon the Orks, filling the sulphur yellow skies with criss-crossing energy beams and blossoming explosions. Yet the greenskins were coming down in such numbers that, already, vast armies were building in the ash wastes. Feral Orks and Kommando teams burst from the equatorial jungles and mountain ranges of Armageddon to join the growing throngs. Quick-hitting strikes by the troops on the ground wrested control of many Macrocannons and Defence Lasers -- weapons that were soon turned upon their former owners. Other Orks worked to construct landing strips, allowing Dakkajets and Blitza-Bommerz to refuel and re-enter the fight more quickly. Gradually, the Orks began to dominate the dogfights that had been takingplace overhead, and they soon ruled the skies. Anywhere that the Imperial forces gathered to establish a defensive line was subjected to punishing bombardment and strafing runs.Through surging spearheads and the unbridled fury of their attacks, the Orks were gaining the upper hand everywhere. However, at that stage in the battle many Chapters of Space Marines began to arrive. Once again, their rapid assaults threatened to unravel the greenskin advance. Ghazghkull had foreseen this and prepared his own countermeasures. It was betrayal, not battle, that felled the first hive city, as Acheron was captured by treachery from within. To aid the wars raging across the ash wastes, Ghazghkull signalled for his next surprise. In orbit high above Armageddon, space hulks and asteroid fortresses jettisoned chunks of themselves to plummet downwards to Armageddon: the Ork Roks were unleashed.During his first invasion, Ghazghkull found his attacks blunted by rapid strikes from Space Marines. Despite the high mobility of the greenskin armies, they could not match the Adeptus Astartes' quick-hitting capabilities. Worse still, the stymied greenskin advances turned to routs before Ghazghkull could counterattack. The Roks changed all that. Ork Roks are hollowed-out hunks of asteroid that have been fitted with crude engines and weapons, and filled with troops. They descend from orbit and their fiery trail is slowed somewhat by powerful force fields, retro-rockets and modified Traktor Kannons.On Armageddon, the Roks made landings in the verdant equatorial jungles and across all of Armageddon’s continents, not just upon the populated landmasses of Primus and Secundus. Some Roks were lost to ground fire or smashed apart by their own impact, but many more survived. Not only did they slam into the planet to crush anything below, but the shockwaves of those landings were devastating. Even as the Space Marines began their attack runs to stall the Orks' advance, they found the Roks crashing amongst them. Each landed Rok became a bastion for the Orks, a rallying point and a ready-made fortress. But there was more: as well as guns, the Roks contained Tellyporta arrays like those first used by Ghazghkull in his Piscina campaign. These were swiftly used to bring Ork reinforcements to the planet, countering the Space Marines' attacks. They included special Marine-killa mobs, Stompas, artillery and even Gargants.