Sith stealth regiment

The isolated Force nexus of Thule played host to a Sith stealth regiment of the old Sith Empire during the Manderon Period. One of the few vestigial communities of Sith to survive the Great Hyperspace War and subsequent Sith genocide, this group remained in seclusion on Thule for centuries in preparation for the eventual return of the Sith to the galaxy.

History
Sometime prior to 5000 BBY, a Sith stealth regiment of the old Sith Empire settled the secluded Force nexus of Thule. This special forces unit was drawn to Thule both for its isolated location on the westernmost edges of the Stygian Caldera and for its natural concerted power in the dark side of the Force.

Following the Sith Empire's defeat in the Great Hyperspace War, a small number of Sith refugees and loyalists fled to Thule in an effort to escape the Sith genocide, a joint Jedi-Republic counter-invasion of the Sith Worlds aimed at the systematic extermination of the Sith species. Confident that the Empire's defeat at the hands of the Republic would be temporary, the regiment remained in seclusion on Thule, bolstering its ranks with Sith loyalists and training in preparation to serve as an advance force for a resurgent Sith Empire.

The group persisted through the passage of the centuries, maintaining ties with other vestigial groups of Sith loyalists who had similarly survived the collapse of the old Sith Empire. Though their numbers sank significantly in the years that followed, the descendants of the original group contained to pledge themselves to the service of the Sith Lords even into the Imperial Period.