Planet Killer - Battle of Gethsemane: Abaddon left the Planet Killer under the command of his subsidiary Warmaster Malefica Arkham and travelled with the Blackstone Fortresses under his control to the Schindlegeist System to attack Blackstone Fortress V in 151.M41. The Planet Killer was despatched to attack Arimaspia as a diversion.With a formidable fleet composed of 17 capital ships (including 2 battleships and 2 battlecruisers) and 20 escorts under his command, the Imperial Navy's Lord Admiral Cornelius Ravensburg, the commander of Battlefleet Gothic, pursued the enemy fleet into the Gethsemane region.Realising their plight, the Chaos forces attempted to head out-system again to try to get far enough from Gethsemane's star to attempt a Warp jump. Ravensburg detached the fastest vessels in his fleet to pursue and a week-long sternchase ensued. The action that resulted was recorded by Captain Blythe of the Guardian.As the Imperial vessels followed the fleeing Chaos fleet, signals came in warning of another enemy fleet on a closing course. The Imperial starships had been lured into a cunning trap. Bolstered by a further 12 warships, the Chaos fleet turned on the Imperial vessels and it was all they could do to evade the bulk of the enemy.Even in doing so, they lost 3 destroyers and 4 frigates in a series of small skirmishes. The enemy losses totalled at least 5 escorts and maybe as many as 10 or more.With all of the massive warships remaining with Lord Admiral Ravensburg's command, there was little else the Imperial vessels could do but run. Blythe and his battlegroup headed back towards the vicinity of Ravensburg's main fleet, but even with his other capital ship, the Imperial forces were still outgunned to a serious degree.For three solar days the two fleets circled and dodged each other through the system, neither fleet commander prepared to commit the bulk of their ships against an enemy whose exact position was unknown. Three solar weeks after arriving in-system, Ravensburg's fleet and the Chaos armada clashed. Six Firestorm-class frigates located the Chaos warfleet near Gethsemane II, using the cover of several dust clouds to avoid being detected themselves.Seizing the opportunity, the lord admiral moved his whole fleet in to attack. Ravensburg's Cobra-class destroyers launched several torpedo salvoes at extreme range.Although they had little hope of inflicting damage, the torpedo attacks forced the Chaotic warships to alter their heading so that they were moving towards the Imperium's capital ships. Forced into a head-on clash with the Imperial fleet, the Chaos vessels came off poorly in the initial exchange of fire.Salvoes of Imperial torpedoes screamed into the Chaos fleet. Some were evaded, others hit home with the blossom of explosions. The Imperial escorts carefully kept the enemy herded in a compact mass as the other Imperial warships passed through their lines. When Lord Admiral Ravensburg gave the order, the Imperial capital ships poured a continuous fusillade into the Archenemy's ships. The stars were thick with the enemy, and the Imperials could not miss at such short range.The Imperial fleet tore through their adversaries, crippling 4 capital ships and destroying 11 Escorts in the initial pass. Rather than turning to fight, the Chaos Warmaster ordered his fleet to continue on their course in a bid to escape. As the faster Renegade vessels accelerated away from Ravensburg's pursuit, it looked as if the Chaos warfleet would once again escape justice.Even as the enemy drew away, more drama occurred, as recorded by Captain Drew of the Fortitude. The Chaotic fleet was suddenly attacked without warning as Craftworld Aeldari warships appeared in front of the Chaos vessels as if from nowhere. Even as the Imperial fleet attempted to haul onto a new heading, their dread became ecstatic happiness as the Aeldari attacked the enemy.Caught between the attacking Eldar and Ravensburg's fleet, the Chaos warships were annihilated, although a dozen more of the Emperor's vessels were crippled or destroyed before the victory was finally claimed. Why the Aeldari decided to lend their weight to the Imperial cause was never discovered, though it is a common belief that they had finally heard of Abaddon's capture of the Blackstone Fortresses and had seen an alliance with the Mon-keigh as their only chance for survival.By the end of 151.M41, Abaddon had been defeated at Schindlegeist, but the Planet Killer succeeded in destroying two of the five planets that make up the Arimaspia System.With Abaddon's fleet gone, the attention of the Imperial Navy was turned on the other Chaos fleets. The Warp Storms had decreased to almost their normal level and scores of ships poured into the Gothic Sector. Many of the Chaos Lords followed Abaddon and fled back to the Eye of Terror, to nurse their hatred and bitterness until another opportunity to attack came.However, the fight was never truly finished, for there are worlds within the Graildark Nebula that still await the Emperor's fleets to free them. There are scattered Chaos warships and even two or three Chaos fleets that still roam the darkness between the stars of the Hammerhead Deeps and the Cyclops Cluster, waiting for their chance to strike again.