Battle of Haruun Kal A battle took place on the planet Haruun Kal during the Clone Wars . Jedi General Depa Billaba led her battalion of Republic clone trooper s against enemy forces from the Confederacy of Independent Systems . The Separatist commander , General Grievous , engineered an onslaught that claimed the lives of ninety percent of Billaba ' s troop s , resulting in a Confederate victory . Grievous personally bested Billaba in single combat , and she remained in a coma for the next six months as she healed from her extensive injuries . Eventually , she recovered and received command of a new battalion of soldier s , though her failure at Haruun Kal haunted her for some time . The battle . During the Clone Wars , the planet Haruun Kal became a battlefield when detachments from the Grand Army of the Republic and the military of the Confederacy of Independent Systems clashed there . Overseeing the Republic infantry was Jedi General Depa Billaba , a member of the Jedi High Council . Her battalion of clone trooper s encountered resistance in the form of the Confederate General Grievous . Grievous ' s forces decimated Billaba ' s troop s , causing her unit to suffer ninety percent casualties . Only four soldier s survived the carnage : Commander CC - 10 / 994 , nicknamed " Grey " ; Captain Styles ; Sergeant Soot ; and Corporal Big - Mouth . Grievous , meanwhile , engaged Billaba in single combat and defeated her , severely injuring her and rendering her comatose . Though Grievous failed to confirm her death , the Confederacy eventually learned of her survival and included it in its intelligence files . Aftermath . On account of the Republic ' s catastrophic losses , the Confederate forces claimed victory on Haruun Kal . Billaba was brought back to the Jedi Temple on the Republic capital of Coruscant , where she entered medical treatment . Some of her surviving men , including Styles and Grey , believed that they had failed her at Haruun Kal and swore to never do so again . Billaba did not emerge from her coma until six months later , at which point her fellow Jedi Master s evaluated her and allowed her to return to her seat on the Jedi High Council . Her defeat at Haruun Kal not only tarnished her reputation as a military commander , but it also hindered her confidence as a general and forced her to live with the guilt of losing so many men . Nevertheless , she helped to thwart a Separatist attack on the Jedi Temple and resumed her military service with a new Padawan , Caleb Dume . Grey , Styles , and the other survivors of Billaba ' s previous unit became the commanding officer s of her new battalion within the Grand Army . Behind the scenes . The battle of Haruun Kal was created as part of the backstory for " " , a canon comic series published by Marvel Comics . Writer Greg Weisman developed the details of the battle for the series ' second story arc , " " . The battle was initially alluded to in the story arc ' s , while the revealed that the conflict had taken place on Haruun Kal , a location that was introduced in the non - canon " Star Wars " Legends continuity . Both comic issues were released in late 2015 . The plot point of Depa Billaba entering a coma after a battle on Haruun Kal originated in " Shatterpoint " , a Legends novel that was written by author Matthew Stover and published in June 2003 .