Around the time of 3638 BBY, specifically during the Galactic War that saw the Galactic Republic in conflict with the Sith Empire, the Republic launched an assault on the Kalsunor system. This star system, located within the nebula close to Dromund Kaas (the Empire's capital), was targeted after the Republic forces successfully penetrated the Stygian Caldera. The Republic's offensive resulted in the capture of the Kalsunor system, marking a significant triumph within the Empire's domain.