The Scarus Sector is an Imperial Sector of the Segmentum Obscurus that is close to the Eye of Terror and is also adjacent to the Calixis Sector. The Scarus Sector has long served as the primary theatre of operations for the renowned Inquisitors Gregor Eisenhorn and Gideon Ravenor. It was also the site of the protracted Siege of Vraks from 813.M41 until 830.M41.