Battle of Sullust The Battle of Sullust was a conflict which took place during the Clone Wars , a conflict between the Galactic Republic and the Confederacy of Independent Systems for control over the planet Sullust . During this battle , Asajj Ventress commanded Separatist forces , but was targeted by Count Dooku , who wished to prove his allegiance to his Sith Master , Lord Sidious . Ventress was presumed dead in the conflict , but had escaped , while the Galactic Republic succeeded in its objectives with moderate cost . Prelude . Despite her past failures during battles on Teth , Rugosa , and Kamino , Ventress was Dooku ' s most trusted and cunning assassin . However , Lord Sidious feared that she was being trained by Dooku so that Dooku would become the master and Ventress as his apprentice . Dooku then sent Ventress to Sullust . The Battle . In 20 BBY , Ventress and TJ - 912 led the the Separatist navy against the Republic Navy under Jedi General s Obi - Wan Kenobi , Anakin Skywalker , and Admiral Wullf Yularen . Ventress , in her " Ginivex " - class fanblade starfighter then led two groups of fighters in attacking the Republic ' s flagship , the " Resolute " . With the Droid tri - fighter s , Ventress was able to destroy the " Resolute " . Yularen was able to escape the " Resolute " < nowiki > ' < / nowiki > s destruction . Ventress and her fighters then pursued Kenobi and Skywalker in their fighters . Ventress pursued Kenobi while her fighters went after Skywalker . Ventress was then able to shoot down Kenobi and force him to land on the separatist command ship . Ventress was then forced to crash - land on the command ship when Skywalker shot her down . Betrayal of Asajj Ventress . However , during the battle , Dooku was then contacted by Lord Sidious . Sidious told Dooku that he sensed a Disturbance in the Force . Sidious suspected Dooku was training Ventress to his Sith apprentice to destroy him , and demanded that Dooku eliminate her as a test of loyalty to him . Despite his objections , Dooku carried out his master ' s wish and recalled Ventress ' reinforcement . Dooku then contacted Ventress , telling her that she was no longer his apprentice and would die . Ventress then dueled Kenobi and Skywalker in the command ship ' s hangar . She was able to evade the Jedi ' s attacks until they force - pushed against her fighter . However , Ventress was able to force - choke them until TJ - 912 , under Dooku ' s orders , fired on the command ship to kill her . Kenobi and Skywalker were able to return to their fighters . Ventress was able to return to her fighter just as the command ship was destroyed . However , her fighter ' s life support failed and she was left unconscious in her fighter . TJ - 912 reported to Dooku that Ventress was killed . Dooku then ordered the Tactical droid to withdraw from Sullust with what remained of their forces . Aftermath . Dooku then reported Ventress ' s death to Sidious , who was pleased with Dooku ' s compliance . Both Dooku and the Jedi Order believed that Ventress was killed during the battle . In truth , Ventress was found alive by Ratch ' s crew of the " Raider " . She was then revived by them and demanded that they take her home to Dathomir . When they refused , Ventress force - choked and killed them . She then took the " Raider " to Dathomir . There , she was taken by Mother Talzin and her Nightsisters where she recuperated . Together , Ventress , with help from her fellow nightsisters , planned her revenge on Count Dooku .