Hypori / Legends Hypori ( ) was a planet located in the Ferra sector of the Outer Rim Territories notable for being a heavy battle droid producer during the Clone Wars . Geography . Hypori was a planet located in the Ferra sector of the Outer Rim Territories . It was a temperate world of small oceans and rocky landscapes , rich with minerals . The planet had no intelligent life . History . Old Republic era . Hypori was the site of a battle during the Galactic War between the Galactic Republic and the Sith Empire . Imperial forces attacked the prototype " Gilded Meteor " bomber on its maiden voyage above the planet . Sith training ground . In the last decades of the Republic , Hypori belonged to the Techno Union . Its foreman , Wat Tambor , agreed to supply the planet as a training ground for Damask Holdings and its Echani Sun Guard , providing the necessary battle droids , in exchange for Tambor ' s seat in the Galactic Senate . In 54 BBY , the Dark Lord of the Sith Darth Plagueis trained his apprentice Darth Sidious on Hypori with assassin droids . In 37 BBY , during Darth Maul ' s training under the command of Darth Sidious , the Nightbrother spent a month on the planet without food or water and with a horde of assassin droids as his opponents . Sidious returned to fight against Maul , easily besting his exhausted apprentice and depriving him of his lightsaber . Enraged , Maul continued to attack Sidious with his fists and teeth . Pleased , Sidious appraised him for passing the final test , and Maul was given the title of Sith Lord , secretly against Darth Plagueis ' wishes . Clone Wars . Following the Invasion of Naboo , Hypori and the nearby planet Geonosis were transformed into a secret foundry world for the Trade Federation . An entire hive of Geonosian workers was relocated to Hypori in a sponsored effort by Baktoid Armor Workshop to construct and maintain the new Separatist droid factories . The tough bedrock and soil proved difficult to assimilate into a true and proper hive - mound , though the Geonosian workers eventually created huge underground factories . The existence of these droid factories was kept secret from the Galactic Republic during the lead - up to the Clone Wars . Shortly after the onset of the Clone Wars , Jedi Master Daakman Barrek and his Padawan , Sha ' a Gi , uncovered the Separatist operations on Hypori during an intelligence - gathering mission in the sector . They reported back to the Jedi High Council on Coruscant , which dispatched a Jedi and clone trooper strike team to investigate further . Unfortunately for the Republic forces , the Separatists had not left Hypori undefended . Disguised mines seeded in orbit crippled much of the task force . The surviving Jedi — among them Ki - Adi - Mundi , Shaak Ti , K ' Kruhk , Tarr Seirr , Sha ' a Gi , and Aayla Secura — were ambushed by legions of B2 super battle droids and OG - 9 homing spider droids led by General Grievous . The ruined hulk of an " Acclamator " - class assault ship that had crashed into Hypori ' s surface became the site of an epic battle between the droid commander and the Jedi , from which only four Jedi emerged alive , with the help of ARC Captain Fordo and the Muunilinst 10 . Though some of the battle droids were destroyed during the rescue attempt , the droid factories on Hypori remained in operation during the war . At least one remained operational after the end of the Clone Wars , after Darth Vader ordered the deactivation of the Separatist droid armies from Mustafar in 19 BBY . Galactic Civil War . The planet was abandoned until the Hutt Cartel learned of the existence of a droid factory that had survived the Clone Wars . They lured the Zann Consortium to the planet ' s surface , hoping that Tyber Zann ' s army would deactivate the hostile droideka Mark II s , thus ensuring that Jabba the Hutt ' s forces could land and gain control of the planet — in the process killing Zann himself . However , the plan backfired , and cost Jabba greatly . The Consortium then used the technology on this planet to produce droideka Mark IIs . In the aftermath , Jabba and Zann agreed to a ceasefire .