Imperial II - class Star Destroyer / Legends The Imperial II " - class Star Destroyer , also known as the Imperial II " - class Destroyer and colloquially the " ImpStar Deuce " , was a Star Destroyer model that was derived from the " Imperial I " - class Star Destroyer . Characteristics . Several differences existed between the " Imperial I " and " Imperial II " - class Star Destroyer , including the replacement of the tractor beam targeting array between the command tower ' s sensor globes with a communications tower , as well as the removal of point defense weaponry . The " Imperial II " was built with a heavily reinforced hull , stronger deflector shields , and greater firepower than the original " Imperial I " class . The prominent quad heavy turbolaser and heavy ion cannon turrets flanking the surface of the " Imperial I " - class Star Destroyer were also replaced with batteries of eight - barreled turbolasers or ions in unarmored mountings . Another new feature included two parallel " claws " for grappling smaller starships placed in the ventral secondary docking bay . The " Imperial II " - class Star Destroyer was not without problems . The " Errant Venture " , formerly the " Virulence " , was continually breaking down due to lack of maintenance . During the height of the Rebellion , an Alliance Special Operations man said that the Star Destroyer had 174 , 000 design flaws waiting to be exploited . The command deck was also a vulnerability , as the ship ' s operations were coordinated there . Removal of point defense weapons was perhaps the greatest issue , due to the Alliances heavy use of starfighters . Despite these flaws as well as the vast resources required to maintain and crew the vessels , they nevertheless remained formidable front line units , even when compared to more efficient and modern designs such as the " Nebula " - class and " Turbulent " - class Star Destroyers . History . The class began with the prototype " Imperial II " known as the " Empire " , commanded by Admiral Feyet Kiez . The vessel was more powerful than later vessels of the line and was said to have amassed a reputation similar to that of the " Executor " . The first operational ships of this class began to appear in service shortly before the Battle of Yavin . Many participated at the Battle of Hoth , such as the " Avenger " and " Stalker " . During the final years of the Galactic Empire under Emperor Palpatine ' s rule , this starship was instrumental in the implementation of the Tarkin Doctrine . The class also participated in the Battle of Endor in 4 ABY and three Destroyers had their barbette mountings destroyed by Arvel Crynyd to protect the Rebel cruiser " Home One . " The class remained in service for a significant length of time , despite more advanced starship designs being available . These warships were seen even during the Yuuzhan Vong War , being used for both offensive and defensive roles in critical missions . However , the ImpStar Deuce was not just used by the military . One " Imperial II " - class Star Destroyer was owned by the civilian smuggler Booster Terrik . During the final engagements of the Bacta War , he accepted the surrender of the " Virulence " , a vessel of that class , and after having to cut the ship ' s armaments to fit with New Republic regulations , he renamed it the " Errant Venture " . During the events of the Second Galactic Civil War , the class remained operational , as Jacen Solo commanded the " Anakin Solo " , a heavily upgraded and modified vessel which was in the service of the Galactic Alliance Guard . When the Imperial Remnant finally entered the war , it was able to field a fleet of these vessels , showing the type ' s prolonged service to the Empire . Supreme Commander Gilad Pellaeon , however , chose the " Bloodfin " , a newly built " Turbulent " - class Star Destroyer , as the Imperial flagship . Behind the scenes . The most prominent weapons on the second Star Destroyer model that appears in " " and " " are eight barbette mountings , each mounting eight gun - barrels , which are arranged in rows of four on either side of the superstructure . They replace the heavy turbolasers and heavy ion cannons on the ISD - I . Numerous Expanded Universe sources cite the armament of the " Imperial II " as consisting of 50 turbolasers , heavy turbolasers or turbolaser batteries , and ion cannons . At present , there is no canon source defining how the visible guns on the model relate to the armament stated in secondary sources , but the most likely estimation is that they correspond to weapons - distribution similar to earlier models like the " Imperial I " - class and the " Venator " - class . The guns on each side of the superstructure would then be the heaviest .