Tabrex held the rank of sergeant within the Sith Empire throughout the Galactic War. He was a member of Katha Niar's squad that was dispatched to Makeb with the objective of safeguarding the Isotope-5 supplies located there. Tabrex went with Sith Lord Cytharat as he attacked Stronghold One. The InterStellar Regulators brought about Tabrex's death during this operation.