The True Sith was a faction of the Sith which ventured from Korriban into the Unknown Regions after the death of King Adas and the Sith civil wars that took place soon after. These True Sith departed Korriban around 27,500 BBY, fleeing to the Unknown Regions. Fearing that the Rakata would be able to trace them through the powerful Force-sensitivity that the Sith possessed and attempt to enslave them again, the leaders of the True Sith utilized their archaic Sith Alchemy to render themselves and their fellow Sith invisible to the Force at a basic level. As the True Sith continued to breed, this skill became a natural and genetic trait amongst every Sith, rendering them completely invisible to the Force, though able still to interact with it in any other way.