The Clone Wars : Decide Your Destiny : The Lost Legion The Lost Legion is a " " young - reader book based on the . It was published on July 23 , 2009 . Publisher ' s summary . " Do you have what it takes to be a clone trooper in the Republic Army ? In this " Decide Your Destiny " story set in the world of you can choose from multiple characters — such as medic , commander , demolitions expert , or recon — and dozens of paths to create your own adventure . With over twenty - five different endings , every time you read this book it ' ll be a whole new adventure . " Plot summary . While on a routine mission to the snow - covered planet Ando Prime , the 313th Legion , under the command of Jedi General Po Bandis , discovers a covert Separatist manufacturing facility . The installation is churning out battle droids but is also home to Skakoan engineer Vylagos , who is under Separatist contract to develop war materials , including experimental weapons and transportation devices . One such device , a hyperspace wormhole transporter , was intended to launch a sneak attack on Coruscant but is accidentally activated in the clash between the 313th and Koorivar General Terrus ' s droid army , sending the combatants to an unknown planet in the Outer Rim . The Jedi Council is certain that this " lost legion " is alive , so they select Clone Commander Vargus ' s Excelsior Company to reconnoiter Ando Prime and discover the nature of their disappearance . Meanwhile , Count Dooku dispatches General Grievous and a squad of battle droids to Ando Prime to ascertain the disposition of the facility . First , Vargus and his squad stop off at Kamino to replenish their numbers , picking up new clone troopers fresh off of their final assessment to determine specializations and squad assignments . Among the shinies tapped for Excelsior ' s mission are at least one scout , medic , demolitions expert , and sergeant . Arriving on Ando Prime , Excelsior Squad splits into smaller teams , with veterans working alongside the rookies , allowing them to make decisions in the field about the direction of the mission . ARF trooper Falco and the new scout , eventually nicknamed " Recon , " lead members of the squad to the remote facility and discover General Obi - Wan Kenobi and Commander Cody already in the facility having been near Ando Prime and jumping over to lend their considerable skills to the search . During the mission , the veteran medic , Splice , and a new medic tend to a wounded native Talid named Gen - Goma who leads members of the squad to the facility . This medic also revives engineer Vylagos so his knowledge of the transporter can be used and ( once transported to the unknown location of the 313th ) synthesizes an anti - venom , saving the life of General Bandis . Demolitions expert Dom ( a . k . a . " Bruiser " ) works with the newly christened " Demo " to open a collapsed secret passageway to the facility as well as destroying the portions of Separatist weaponry that had been transported with the fighting forces . The new sergeant , inspired by the confidence placed in him by superiors Vargus , Cody , and Kenobi , takes to leadership very well , commandeering a Separatist tank and earning the nickname " Ace . " Excelsior Squad , along with Kenobi and Cody , persuade Vylagos to repair and activate the transportation device and arrive on the unknown desert planet . There they turn the tide of the ongoing battle . Using a homing beacon and the hyperspace wormhole transporter , the Republic forces are transported safely back to Ando Prime where the new clones are commended for their , now battle - tested mettle . Behind the scenes . The " decide your destiny " nature of this book predicates that the reader follows the narrative of a single clone trooper , initially known as 18 ( because the final two digits of his serial number are 1 and 8 ) , through four separate paths ( scout , demolitions , medic , and sergeant ) . Other new troopers included in the group selected for Excelsior Squad have numbers of 15 , 16 , 23 , 35 , 44 , and 57 . Depending on the choices the reader makes for 18 , two other troopers are assigned nicknames : " Slug " ( for 44 ) and " Patch " ( for 57 ) . The plot summary above is based on a synthesis of the " correct " choices presented to the reader for all four paths . Allowing for the possibility that there are , somehow , four separate trooper 18 ' s , even the medic path isn ' t necessarily in conflict with the other paths ( " Patch " is the nickname given to medic trooper 57 ) as there could be more than one medic in the squad . Each path presents conceivably different perspectives of the same core series of events . Even " incorrect " choices lead to ambiguous , unresolved endings but never the death of 18 , the certainty of a failed mission for Excelsior Squad as a whole , nor the permanent loss of the 313th Legion . Cover gallery . This is a gallery of different cover variations of " The Clone Wars : Decide Your Destiny : The Lost Legion " .