Sleipner sector

Originally, the Sleipner sector was an Imperium controlled sector of space which had its internal strifes and rebellions, not too different to any other sector in the Imperium. However, the sector was the target and prize of an enormous Ork Waaagh! led by the Ork Warlord Grimskul, whose size rivalled the Ork forces assailign Armageddon.   Imperial forces were swept aside and the High Lords had no appetitie to dedicate forces to attempt to reclaim the sector, knowing what other more strategically important conflicts were going on.