Battle of Haunted Gulf
The Battle of Haunted Gulf took place in 189999.M41 and was the climax of a confrontation between Commissar Sebastian Yarrick and Warboss Ghazghkull Mag Uruk Thraka.
During the Third War for Armageddon, Ghazghkull had become bored with the conflict and was drawn by visions of Gork and Mork to parts of the Galaxy unknown, assured that a Great Waaagh! was waiting for him. Leaving Armageddon on his flagship Kill Wrecka, Ghazghkull was pursued by his old foe Commissar Yarrick.
Yarrick and his ally High Marshal Helbrecht of the Black Templars were finally able to corner Ghazghkull in a barren zone of space known as the Haunted Gulf. Faced with both an Imperial Navy and Space Marine fleet, the Ork forces were mauled in ship-to-ship combat despite crippling several Imperial Battleships. With Kill Wrecka surrounded, the forces of the Imperium prepared a boarding action when a wave of Weirdboy-generated green energy issues forth from the Ghazghkull's ship and shuts down all systems aboard Imperial ships. They can do nothing as Kill Wrecka disappears into the Warp, leaving behind no clues.
Kill Wrecka eventually emerged at the Ork Empire of Octarius, where he aided his greenskin brethren against Hive Fleet Leviathan in the Octarian War.