Around the year 4043 BBY, a Kaggath was waged by the two Dark Councilors, specifically Darth Qalar and Darth Victun, within the Imperial Citadel located on Dromund Kaas. The Kaggath resulted in the complete destruction of the Citadel, and following this event, the remaining ten Council members swiftly killed both Qalar and Victun. Darth Nostrem was then tasked with supervising the reconstruction of the Citadel, adhering to blueprints supplied by both the Dark Council and the Sith Emperor.