Cuy ' val Dar The Cuy ' val Dar were a group of one hundred individuals summoned by Mandalorian bounty hunter Jango Fett , to come to the watery world of Kamino to train clone troopers for the Galactic Republic . Of these one hundred males and females , seventy - five were Mandalorians like Fett , and in the Mandalorian language " Cuy ' val Dar " meant " those who no longer exist " — a name stemming from the need for these individuals to disappear to Kamino without contact with the outside galaxy due to the secrecy surrounding the developing Grand Army of the Republic . For close to ten years , these one hundred training sergeants trained the Grand Army ' s ten thousand clone commandos until their deployment at the Battle of Geonosis in 22 BBY , which sparked the galactic Clone Wars . With their contract up , many of the " Cuy ' val Dar " trainers went back to their lives , but a small number continued professional relations with the Republic , returning to train further generations of clones on Kamino , and later cross - training standard clone soldiers with commando skills . Nearly fifty years later , in 25 ABY , New Republic Intelligence agent and Jedi Knight Kubariet , met with " Mand ' alor " Boba Fett on Vorpa ' ya in the first year of the Yuuzhan Vong War . There , Kubariet requested that Fett form a new " Cuy ' val Dar " group made up of experienced Mandalorian commandos , who could take on the task of training planetary militias to combat the Yuuzhan Vong . History . In the year 32 BBY , Count Dooku of Serenno — a former Jedi Master who left the Jedi Order only to fall to the dark side of the Force , becoming the Sith Lord " Darth Tyranus " — convinced the Mandalorian bounty hunter Jango Fett to become the progenitor of an army of clones to be grown on the planet Kamino . Fett , an accomplished soldier himself , knew that an effective army would require variety , and troops that could handle more dangerous and complex missions . With this in mind , Fett reached out to individuals throughout the galaxy to train elite clone commandos , beings with special skill sets ranging from military and survival skills , to tracking and communication experts . Numbering one hundred in total , seventy - five of these trainers were Mandalorians like Fett , and these unique , hand - picked individuals formed the group known as the " Cuy ' val Dar " , which in the Mandalorian language of " Mando ' a " meant " Those Who No - Longer Exist . " The origins of the name stemmed from the necessity of the " Cuy ' val Dar " to leave their lives behind and vanish to Kamino for an indeterminate amount of time , where they would have no contact with the outside galaxy beyond its borders . Most were thought dead or missing in action , having left any family and friends they had without explanation . A large number of the " Cuy ' val Dar " came from professional backgrounds that would commonly be considered fringe by the standards of Galactic Republic society , with bounty hunters , mercenaries , and assassins among their ranks . Yet upon answering Fett ' s summons to Kamino , this eclectic assortment of beings took up the role of training sergeants for the commandos that would make up the Grand Army of the Republic ' s special forces . With the exception of Fett — who personally took on the responsibility of training the one hundred " Alpha " - class Advanced Recon Commandos — circa 30 BBY , each " Cuy ' val Dar " sergeant was given a company of one hundred and four clone cadets to turn into commandos . The commandos - in - training were not limited to their assigned sergeants in the course of their education , and there were several members of the " Cuy ' val Dar " who had unique skills to be passed on . Sergeant Mij Gilamar was a trained doctor in addition to being a Mandalorian soldier , and he instructed the clones in the techniques of a combat medic . Kal Skirata , another Mandalorian and one reputed as a dirty fighter , taught the clones counter - insurgent tactics . The " Cuy ' val Dar " trainers came to have a substantial impact on the clones they trained , stretching beyond teaching skills and moving into influencing their personalities . Mandalorian sergeant Walon Vau believed in training his men hard so that they would be able to face whatever actual combat had to offer , making them into survivors on an animal level . His theory was be given credence by the fact that squads trained by Vau had the highest survival rating following their devastating first deployment . The commandos of Delta Squad came to look upon Vau with genuine gratitude for his training , but RC - 3222 — or " Atin " — resented and came to hate Vau for his brutality . Sergeant Kal Skirata took a different approach : though no less dutiful in his training , Skirata encouraged the men in his charge , and treated them as he would his sons . Fellow Mandalorian sergeant Rav Bralor had a similar approach with her own squads , and both Skirata and Bralor were looked upon with familial feelings by their clone trainees in return . Nearly all of the Mandalorian training sergeants , regardless of their training styles , imbued a sense of being Mandalorian upon their charges , teaching the clones of Jango Fett about their Mandalorian heritage , and in response , a large number of the clone commandos took to that heritage enthusiastically . This was not a trait unique to the Mandalorian trainers and their clones , however , as commandos trained by a Corellian just as readily took on Corellian traits and elements of the culture as well , and the same could be said of clones trained by sergeants from Concord Dawn , such as the former Journeyman Protector Cort Davin . One Mandalorian instructor , considered among the finest in the " Cuy ' val Dar " , trained a clone soldier by the name of Kaddak , a name the aspiring commando took from the ancient destroyer god Kad Ha ' rangir of Mandalorian mythology . Kaddak and his " Cuy ' val Dar " instructor developed a contentious relationship over time , which eventually led to a fight between the two . Using nothing but his bare hands , Kaddak killed the instructor , and was subsequently incarcerated by the Kaminoans and subjected to testing . According to rumor , Kaddak was ultimately terminated by the Kaminoans , though in truth he managed to escape Kamino , coming to reside on Ostor . The Grand Army was finally mobilized in 22 BBY , approximately ten years after it was created . However , because of the rapid nature of the army ' s deployment , many — if not all — of the " Cuy ' val Dar " sergeants were unable to say their farewells to the commandos they had trained , some of whom never returned from the battle on Geonosis . With the Kamino contract over once the Clone Wars had broken out between the Republic and the Separatist Confederacy of Independent Systems , nearly all of the " Cuy ' val Dar " went their separate ways , returning to the lives they left almost a decade prior , and doing so with a significant sum of credits for their rendered services . Kal Skirata , though , managed to secure himself a role as military advisor to the Grand Army ' s Special Operations Brigade as part of a deal with Jedi Master Iri Camas , and later Director of Special Forces , Jedi General Arligan Zey . By the second year of the war , Walon Vau had also returned to the employ of the Republic , even taking part in a strike against Jabiimi terrorists operating on Coruscant . As time went on , Vau also became involved in the cross - training of standard clone troopers with commando skills , along with the re - employed " Cuy ' val Dar " sergeants Mij Gilamar and Wad ' e Tay ' haai . Members of the " Cuy ' val Dar " were also employed in the training of clones on Kamino for a second time , as part of the enhanced training program instituted by ARC trooper Alpha - 17 . During the course of the training , Cort Davin was responsible for imbuing Clone Commander Bacara of the Galactic Marines with the traditions and culture of the Journeyman Protectors , while Mandalorian trainers passed on elements of their culture to Clone Captain Rex , awarding the soldier the right to wear " jaig " eyes on his armor . The Mandalorian huntress , Vhonte Tervho , imparted her skills with dual DC - 17 blasters to more than a thousand up and coming clone commanders . Several members of the " Cuy ' val Dar " , all of whom were of Mandalorian origin , continued to work together in the years after the Kamino contract was finished in a secret and personal mission aimed at aiding the clones they had trained . Under the unofficial leadership of Kal Skirata , former " Cuy ' val Dar " trainers Walon Vau and Rav Bralor attempted to obtain a means of halting the accelerated aging that plagued the clones by kidnapping Kaminoan scientist Ko Sai . Kamino ' s former Chief Scientist defiantly took her own life at Skirata ' s Mandalore home , Kyrimorut — a location Bralor had secured for Skirata as a hideaway , and as a refuge for any clone who wished to desert the Grand Army in favor of freedom . Fellow " Cuy ' val Dar " sergeant and doctor Mij Gilamar attempted to continue what research they had gained from Ko Sai prior to her death , in addition to acquiring further research from other sources such as Arkanian Microtechnologies with the help of the " Null " - class ARC troopers , before the group abducted the Separatist geneticist Ovolot Qail Uthan , and convinced her to aid them in their quest ; the endeavor eventually bore fruit , and a cure for the clones ' accelerated aging was found and administered . Skirata , Gilamar , Vau , and Bralor , along with their former " Cuy ' val Dar " comrade Wad ' e Tay ' haai , spent a good deal of time at Kyrimorut in the weeks and months following the transformation of the Republic into the Galactic Empire , under the newly crowned Emperor Palpatine . While Skirata his comrades attempted to distance themselves from the Empire and its presence on Mandalore , the former " Cuy ' val Dar " trainers Dred Priest and Isabet Reau — now members of the renegade Death Watch — allied themselves with the Empire as part of Death Watch leader Lorka Gedyc ' s plan to strengthen the Mandalorians . Gilamar later killed Priest in the Mandalorian capital city of Keldabe after his Death Watch ties became known . Many years later , during the first year of the Yuuzhan Vong War , the New Republic Intellegence agent and Jedi Knight Kubariet met with " Mand ' alor " Boba Fett on the planet Vorpa ' ya in the Mandalore sector . There , Kubariet reminded Fett of the " Cuy ' val Dar " formed by his father , Jango , and suggested he form a new group of " Cuy ' val Dar " from his most experienced commandos in order to train planetary militias to resist the Yuuzhan Vong . Behind the scenes . The " Cuy ' val Dar " were first referenced in the 2004 novel " " , by Karen Traviss . There , their role as trainers to the clone commandos hand - picked by Jango Fett was first established . " Cuy ' val Dar " member Walon Vau made cameo appearances in the loading screens of the 2005 video game " " , which " Hard Contact " was originally written to tie in with . The " Cuy ' val Dar " would make their first true appearance in Traviss ' short story " " , and her second novel entry in the " Republic Commando " series , " " , with the appearance of sergeants Kal Skirata and Walon Vau as full - fledged characters . Members of the " Cuy ' val Dar " appeared in Traviss ' subsequent novels " " , " " , and " " . The " Cuy ' val Dar " was also mentioned in Traviss ' e - novella , " " . " Clone Cadets , " the first episode of the of the , introduced the characters of El - Les and Bric . While not directly identified as " Cuy ' val Dar " members in the episode , the two are mercenary bounty hunters employed by the Republic in the training of clone troops on Kamino , a role previously established as belonging to members of the " Cuy ' val Dar " . In her blog , Karen Traviss noted that " [ the " Cuy ' val Dar " ] either needed the fee very badly , or they were insanely loyal to Jango , or they wanted to disappear for reasons best known to themselves . . . and so on . "