Battle of Rishi ( Clone Wars ) A battle was fought in 21 BBY on the planet Rishi during the Clone Wars . After Confederate Geonosian warriors captured Rishi ' s Exonium mines , the Galactic Republic sent the clone trooper division Green Company to repel the invaders . Without a Jedi General ' s leadership , Green Company ' s clone troopers could not defeat the Geonosians , who had heavily entrenched in the mines . However , Jedi Master Kit Fisto soon arrived and formulated an attack plan , which involved him using his lightsaber to deflect clone sharpshooter 2242 ' s blaster shots into the enemy . Using this strategy , Fisto and 2242 managed to kill all Geonosians who guarded the canyon leading to the mines , allowing Green Company to initiate an assault on the mines themselves . Prelude . In 21 BBY , during the Clone Wars , in order to get the Exonium mineral needed for their sonic weapon s , the Confederacy of Independent Systems invaded the planet Rishi and captured its Exonium mines . In response , the Galactic Republic sent the clone trooper division Green Company to repel the Separatists and protect the native Rishii . Since no Jedi General was initially available to lead the clone troopers , and because the Separatist ' s elite Geonosian warriors had heavily entrenched in the mines , the clones were ordered to await Jedi Master Kit Fisto ' s arrival before attempting an attack . In the meantime , the Rishii Chieftain Gwarrk assumed command of Green Company . Gwarrk , however , was desperate to reclaim the Exonium , which was needed for the Rishii to prepare food . To this end , he ordered the Republic forces to initiate an attack . The clones followed Gwarrk ' s order but faced heavy opposition from the Geonosians that guarded the canyon leading to the entrance of the mines . At that moment , however , Fisto finally arrived and ordered all troops to pull back . Gwarrk insisted on another direct assault , but Fisto told him that it would only result in the Republic ' s defeat . Instead , the Jedi Master ordered the clones ' commander to provide him with the company ' s best sharpshooter and keep the rest of the troops ready for battle . The battle . Fisto headed toward the canyon , while clone sharpshooter 2242 , nicknamed " Cooker " for his tendency to hit the Confederate battle droids in the power cells , took position above it . After Cooker had informed Fisto that he would have no line of sight with the enemy from that position , the Jedi Master finally revealed to the clone all of his plan ' s details , which involved Cooker aiming for Fisto ' s shoulder and firing continuously . As the Geonosians attacked Fisto with sonic blasters , the Jedi Master ordered Cooker to open fire and — using a combination of his acrobatic skills and the Force — started moving throughout the canyon , deflecting Cooker ' s blaster shots into the Separatists with his lightsaber . Seeing Fisto fighting the enemy alone , Green Company ' s commander ordered the clone troopers to board their LAAT / i gunships and head out to assist the Jedi . By that moment , however , all Geonosians in the canyon had been killed by Fisto ' s and Cooker ' s combined efforts . Fisto then noticed the massive doors to the mines opening and hoped that this meant a surrender . This proved not to be the case , as the Separatists revealed an LR1K sonic cannon and attacked Fisto with it , knocking him to the ground . At that moment , Cooker contacted Fisto , asking the Jedi to stay down . Demonstrating his sniping skills , Cooker fired a single shot that destroyed the cannon . The Republic forces — along with some of the Rishii warriors — then arrived and attacked the mines , forcing the remaining Geonosians to flee . Afterward , Gwarrk acknowledged that Fisto was very powerful , to which the Jedi replied that two factors had made this victory possible — the power of mind and Cooker ' s help . Behind the scenes . The battle of Rishi was depicted in the 2009 Free Comic Book Day ' s comic " " , written by Henry Gilroy and illustrated by Ramón K . Pérez .