Inexpugnable - class tactical command ship The " Inexpugnable " - class tactical command ship was a large warship class used by the Republic Navy during the Mandalorian Wars . Designed and manufactured by Rendili Hyperworks and Rendili / Vanjervalis Drive Yards , the " Inexpugnable " - class was used as a flagship and command ship . Often described as a mobile space station , at 3 , 100 meters in diameter it was one of the largest Republic spacecraft of its time . Warships of the class saw combat at a number of battles in the Mandalorian Wars , including the Battle of Serroco . The " Inexpugnable " - class was renowned for its ability to lead massive Republic fleets , employing advanced command techniques such as the Vanjervalis Chain to command up to sixty - four " Hammerhead " - class cruisers simultaneously . Despite its usefulness as a fleet flagship , the ship had several weaknesses , and as such , only six " Inexpugnable " - class ships were manufactured — one of which , the " Courageous " , was destroyed in early 3963 BBY , shortly following the Republic ' s involvement in the Mandalorian Wars . They were replaced as Republic command ships by the " Centurion " - class battlecruiser before the end of the Mandalorian Wars . Characteristics . The " Inexpugnable " - class tactical command ship was disc - shaped , with an opening in its center . At 3 , 100 meters in diameter , it was often described as a mobile space station . The bridge was innovative in design ; holograms were projected over a transparent deck on the bridge , providing a merger of electronic and visual data and facilitating command . This bridge design , referred to as the " wishing well " by Republic helmsmen , could sometimes produce vertigo . The " Inexpugnable " - class was operated by a crew of 4 , 300 Republic officers and enlisted personnel . It also carried a total of 2 , 000 troops . The class could carry up to 50 , 000 metric tons of cargo and enough consumables for optimal ship and crew operations for two years . Vessels of the " Inexpugnable " - class were equipped with five double turbolaser batteries , five light turbolaser batteries , two point - defense laser cannon batteries , and two tractor beam batteries . Three turbolaser batteries were situated on each side of the main circular superstructure , along with two near the bridge of the vessel . The " Inexpugnable " - class was propelled by four large thrusters that were in turn powered by engines deep within the circular superstructure . For faster - than - light travel , it came equipped with a Class 2 hyperdrive and a Class 10 hyperdrive as backup . The warship had large hangars and a command area located underneath the main superstructure , to the stern . Additional hangar decks were located on the vessel ' s bow to allow rapid deployment of fighters from multiple levels . In addition to the fighter decks , there was a cargo bay located adjacent to the ship ' s brig . The class could carry 144 " Aurek " - class tactical strikefighters and twenty - four S - 250 " Chela " - class starfighters . The ship was also capable of housing small transports — twenty - four " Conductor " - class landing craft and six " Ministry " - class orbital shuttles . In addition , its hangar bays could carry a number of Republic support ships . Role . The " Inexpugnable " - class served as a command ship in the Republic Navy . Rendili Hyperworks and Rendili / Vanjervalis Drive Yards designed it in order to sell more " Hammerhead " - class cruisers to the Republic . Weapons coordination during the Mandalorian Wars became a major concern for Republic tacticians , as Republic lines were often defended by dozens of " Hammerhead " - class cruisers . The " Inexpugnable " - class was designed with an enhanced sensor package and an innovative bridge design , which allowed a flag officer to command a fleet of up to sixty - four " Hammerhead " - class cruisers at once . The " Inexpugnable " - class ' s many large hangar bays allowed it to rapidly deploy its fighter squadrons , but also made the ship vulnerable to ramming attacks and boarding operations . The role of command ship was later taken up by the smaller " Centurion " - class battlecruiser . History . Prior to the Republic ' s involvement in the Mandalorian Wars , the Republic determined the need for a tactical command ship to coordinate the large fleets of " Hammerhead " - class ships defending its lines . The proof - of - concept " Swiftsure " was built at some point prior to the Mandalorian Wars . Less than half a dozen " Inexpugnable " - class prototypes were constructed before the outbreak of the Mandalorian Wars , designed by Rendili Hyperworks and launched from the Rendili / Vanjervalis Drive Yards at Corellia . This new line of command ships , at an estimated cost of 70 , 000 , 000 credits , effectively replaced the Republic ' s older command ships , such as the " Reliance I " . One of those prototypes was the " Courageous " . The production line also included the " Indefatigable " and the " Tremendous " . They were nicknamed " Inexies " by Republic crewmen . At the end of 3964 BBY , the Mandalorian Wars finally hit the Republic when Mandalorian fleets attacked Vanquo and Taris . " Inexpugnable " - class vessels served as large command ships and battle group flagships in the Republic Navy during the Mandalorian Wars . The " Courageous " , commanded by then - Captain Saul Karath , led its battle group against the Mandalorians during the Battle of Vanquo . In early 3963 BBY , at Serroco , following an intense Force vision , Zayne Carrick , the Jedi apprentice accused of committing the Padawan Massacre , stowed aboard Lieutenant Carth Onasi ' s ship , the " Conductor " - class landing craft " Deadweight " , to warn Karath of an upcoming Mandalorian attack . However , Karath immediately recognized Carrick as a fugitive and imprisoned him in the " Courageous " brig , ignoring the warning . As predicted , the Mandalorians attacked Serroco in force , using nuclear missiles to destroy cities and Republic troops on the planet ' s surface . Following the attack , the " Courageous " was boarded and captured by the Mandalorians . However , Karath , Carrick , and Onasi were able to escape , as Carrick had used the Force to dismantle the wall in his prison cell , allowing them to access the " Deadweight " in the " Courageous " landing bay . The " Courageous " was taken by the Mandalorians and recycled for their own use ; Mandalore the Ultimate later claimed that his battle - axe was forged from the " Courageous " hull . The remnants of the " Courageous " battle group joined the " Tremendous " and its own battle group , while now - Admiral Karath transferred his flag to the " Swiftsure " shortly after the First Battle of Omonoth . Another " Inexpungable " - class that served was the " Diligence " , captained by Dallan Morvis . After the Battle of Serroco , the remaining " Inexpugnable " - class ships , including the " Swiftsure " , the " Tremendous " , and the " Indefatigable " , were equipped with a new sensor package that allowed them to use tactics such as the Vanjervalis Chain , an advanced sensor system that slaved the controls of up to sixty - four " Hammerhead " - class cruisers , predicted enemy movements , and adjusted the fleet for maximum efficiency . The " Swiftsure " was the first to be fitted with the system by the manufacturers , and became the basis for the production model . Karath , in command of the " Swiftsure " , used the Vanjervalis Chain to protect the Republic capital of Coruscant from any attack or infiltration , specifically so that Republic and Jedi forces might intercept Carrick , whom the Jedi Covenant believed was going to attack their operations on Coruscant . However , Haazen , the secret leader of the Jedi Covenant , was able to control all Republic ships linked to the Vanjervalis Chain , since he had directed the Draay Trust to purchase Vanjervalis Systems , and integrated fleet remote controls into Haazen ' s Sith artifact , the Gauntlet of Kressh the Younger . He commanded Karath ' s fleet , including the " Swiftsure " , to attack the Republic strike team threatening his plans . Haazen ' s Vindication , the Jedi Covenant ' s insurrection against the Jedi Order , was stopped when Carrick and his former Master , Lucien Draay , retrieved the Gauntlet of Kressh and used it to command the " Swiftsure " and the Republic fleet to fire upon both Haazen and the Draay Estate on Coruscant ' s surface . Later that year , Karath took the " Swiftsure " and its task force to an asteroid field not far from Ithor . Anticipating a Mandalorian attack , the " Swiftsure " fleet prepared for an engagement with Cassus Fett , a prominent Mandalorian Field Marshal , and his forces . Fett ' s fleet fought a brief battle with the Republic , but the attack was a ruse . Carrick and Fett — who owed a debt to Carrick after having warned the Mandalorians of the Rakghoul plague on Jebble — arranged for the false attack on Republic forces to draw out the Crucible slaver ship " Gladiator " , which Carrick and his friend , Jarael , had previously encountered . When Karath learned of the ruse and its ultimate goal , he directed the " Swiftsure " fleet to capture the " Gladiator " and its captain , Dace Golliard . Golliard revealed the position of the planet Osadia , an important Crucible base of operations and where Jarael was being held captive , to the Republic , and Karath detached the " Hammerhead " - class cruiser " Testament " from his fleet to investigate , taking Carrick and his associate , Marn Hierogryph , along , with the goal of shutting down the Crucible and rescuing Jarael . Only six " Inexpugnable " - class vessels , including prototypes and production models , were ever manufactured , since problems began cropping up with the design . The rest of the production line was abandoned and the role of tactical command ship was filled by the smaller " Centurion " - class battlecruiser . Millennia later , the massive freighters - turned - battleships of the Trade Federation resembled the class ' s design , with Hoersch - Kessel Drive ' s " Lucrehulk " - class battleship having a similar , circular superstructure and even incorporating Rendili StarDrive – made engines . Behind the scenes . The " Inexpugnable " - class tactical command ship first appeared in the of the . Along with other new starship classes in the Republic Navy featured in this issue and in the two arcs " " and " " , the " Inexpugnable " - class appeared to be from the same design lineage as the " Hammerhead " - class cruiser . The " Inexpugnable " - class had a slightly different look in , in which the command ship " Swiftsure " was shown with a more prominent keel and a smaller , rounder primary hull . This different appearance was partially due to artistic interpretation , and also because the " Swiftsure " was the proof - of - concept model . The names of " Inexpugnable " - class vessels were derived from real - world naval ships , according to writer John Jackson Miller . The " Courageous " is named after the ship " " , whose design was used to construct four of , a name shared by Admiral Saul Karath ' s own command ship in the " " video game . The " " was also a British naval vessel during the . There were also ships in the Royal Navy in the same time period named " " and " " . The fifth " Inexpugnable " - class ship , " Diligence " , was named in the 2011 novel " Knight Errant " , though the sixth remains unnamed .