Thustra / Legends Thustra was a planet located within the Thustra system , Sumitra sector of the galaxy ' s Expansion Region . It was also the homeworld of a Near - Human race known as the Sephi . Until the advent of the Clone Wars , Thustra was a member world of the Galactic Republic , and was thus represented in the Galactic Senate by a senator . By 21 BBY , approximately nine months into the civil war , the Sephi betrayed the Republic and joined Thustra with the rebellion of the Confederacy of Independent Systems . History . During the Clone Wars , it was ruled by King Alaric and represented in the Galactic Senate by Alaric ' s nephew , Navi . The Sephi , following the lead of Alaric , had lost faith in the Galactic Republic and were making moves to join the Confederacy of Independent Systems . Supreme Chancellor Palpatine ordered Republic forces to land on the planet in 21 BBY , claiming that he believed a small show of force would urge the Sephi to remain loyal to the Republic . This force was led by Jedi Generals Tyffix and Tyr , along with their Padawans , Cal and Pix . Without provocation , their forces were attacked at night , using suicide bombers . Tyffix , Tyr , and many clone troopers were killed in the attack , leaving the inexperienced Padawans in command . Back on Coruscant , Palpatine consulted with Jedi Master Yoda , making clear his well - founded fears that if Thustra were to secede the entire sector would leave the Republic as well . Yoda had been friends with Alaric for over two hundred years , and believed he would be able to reason with the King . He soon arrived on Thustra and took Cal with him to the palace to meet with Alaric , while Pix and Commander Clutch were ordered to remain where they were no matter what . Once in the palace , Yoda and Alaric quickly began to discuss their differences , with neither willing to admit their side was wrong . Yoda firmly believed that the Clone Wars were merely a part of history , and that the Republic would exist for much longer , and Thustra should not leave due to this . Alaric for his part , believed that the Senate had become so fully obsessed with personal gain that they no longer had the interests of the galaxy at heart , and that Thustra must look after itself for the time being . He then ordered Yoda and Cal to be held prisoner , to prevent further conflict . Senator Navi and his aide , Moje , had been recalled from the Senate to Thustra by Alaric , who knew that Navi was corrupt and had forsaken his own people . Navi , however , didn ' t want Thustra to secede , and set about a plan to ensure Republic domination of the planet . He sent Moje to speak with Cal , who was impatient with Yoda ' s methods , and the aide convinced the young Jedi that he must try to escape the palace or be executed . At the same time , Navi flew to meet with Pix and Clutch , and told them that Alaric had already executed Cal and Yoda and that they must mount a preemptive strike against the assembling Sephi forces . Both lies to affect at the same time , with Cal attempting to flee the palace while Pix led the clones against the Sephi military . The combined actions gave the appearance that the Republic was attempting to assassinate Alaric and take over the planet . In response , the palace guards attacked Cal , and though Yoda attempted to calm the Padawan , Cal was killed in the battle , shot in the back by a guard . Yoda asked Cal to allow him to ease his pain , but the dying Padawan instead blamed Yoda for all that had happened , and died . Yoda then confronted Alaric in his greenhouse , where the king was lamenting the turn of events . As the capital of Thustra fell around him , Alaric pulled a blaster from beneath his robes . He told Yoda that his death would galvanize his people , and that they and the entire sector would never give up if he was killed by the Republic . Yoda asked him not to , but the king shot at the Jedi Master , who deflected the blaster bolt into the king ' s chest . As the king died , he begged Yoda to remember their friendship as it had been , not as it had become . Subsequently , Navi was arrested for his part in the events , and though Moje escaped , he was placed on a wanted list . Thustra was lost to the Republic , and the loss dealt yet another staggering blow to the fragile galactic government . Many years later , Thustra was later conquered by the Yuuzhan Vong during their early advances .