Defiant ( Imperial - class ) Defiant was an " Imperial " - class Star Destroyer that served in the Imperial Remnant ' s navy in 28 ABY , at the time of the Yuuzhan Vong War . Commanded by Captain Essenton , " Defiant " was positioned that year with other warships of the Imperial Navy near the planet Borosk in a defensive effort against an attacking Yuuzhan Vong fleet . During the fighting , a gravitic amplitude modulator was installed upon " Defiant " , which allowed the Star Destroyer to disrupt the telepathic command signals from the enemy yammosk war coordinators long enough to smash through disrupted Yuuzhan Vong battle lines and help destroy a yammosk . Following a successful defense of Borosk , " Defiant " was dispatched to the planet Yaga Minor to fend off an imminent Yuuzhan Vong strike . Description . An " Imperial " - class Star Destroyer , " Defiant " measured 1 , 600 meters in length and was produced by Kuat Drive Yards . Equipped with engines and a hyperdrive , " Defiant " possessed an armament of torpedo es , concussion missiles , and turbolaser banks , with the latter supported by targeting sensor s . The Star Destroyer also had a deflector shield generator . For the Battle of Borosk , a gravitic amplitude modulator — capable of broadcasting gravitic pulses that interfered with the telepathic signals issued by Yuuzhan Vong yammosk creatures — was installed upon " Defiant " . History . Guarding Borosk . By 28 ABY , " Defiant " was serving in the Imperial Remnant ' s fleet , which oversaw the defense of the Remnant ' s holdings in the Outer Rim Territories , and was under the command of Captain Essenton . At that time , the galaxy was engulfed in the Yuuzhan Vong War , instigated by the extra - galactic Yuuzhan Vong invaders . Although the Imperial Remnant was spared much of the initial assault , a Yuuzhan Vong fleet led by B ' shith Vorrik attacked the Remnant in 28 ABY . The Remnant lost its capital planet of Bastion , forcing Grand Admiral Gilad Pellaeon of the Imperial Navy to regroup at the planet Borosk , with " Defiant " part of the fleet elements that assembled there . As the members of a Galactic Alliance team — who were in the Outer Rim searching for the sentient planet Zonama Sekot — shared intelligence with the Imperials that a modified gravitic amplitude modulator , or GAM , could be used to disrupt the signals of the yammosk war coordinators used by the Yuuzhan Vong , such a device was brought to the Borosk system and reprogrammed by Jedi Knight Jacen Solo and other members of the Galactic Alliance team . Vorrik and his Yuuzhan Vong forces pursued the Imperials , arriving at Borosk to assault the Remnant , and " Defiant " was positioned in low planetary orbit behind layers of ion mines that guarded Borosk . However , once the GAM was successfully installed upon " Defiant " , Pellaeon had Lieutenant Arber forgo a test run in order to use the GAM against the Yuuzhan Vong immediately , prompting Essenton to take " Defiant " away from Borosk and engage the enemy , escorted by blastboat s and TIE Series starfighters . Hunting yammosks . Striking where the Imperials knew a yammosk to be , " Defiant " weathered the attacks of the Yuuzhan Vong elements guarding the yammosk and responded in force , with the Star Destroyer ' s turbolasers eradicating whole squadrons of coralskippers . When the GAM was in range of the yammosk , Arber activated the device , and the resulting jamming of the yammosk ' s command frequencies caused the coralskippers and other vessels protecting the yammosk to lose a coherent defensive pattern , allowing " Defiant " and the ships escorting it to close in on the yammosk and its nearest protectors . In response to the GAM ' s activation , coralskippers resorted to suicide runs on " Defiant " bridge , keeping the Star Destroyer ' s turbolasers committed to stopping the enemy fighters . Imperial blastboats stationed near " Defiant " also aided in defending the warship , whittling down passing coralskippers that were too disorganized to go after anything but the Star Destroyer . With TIE fighters strafing the yammosk ' s vessel , the yammosk attempted a last - ditch effort that saw it detonate two nearby Yuuzhan Vong ships to create a shock wave that sent TIEs spinning and knocked out " Defiant " targeting sensors . A recovering TIE fighter was still able to score a direct hit on the yammosk , killing the creature , and " Defiant " then turned its attention to destroying the remaining Yuuzhan Vong capital ships in the vicinity . When Essenton located another yammosk , Pellaeon gave her permission to use " Defiant " to destroy it as well . With Vorrik losing more ships than he intended in the assault , the Yuuzhan Vong commander pulled back his forces from Borosk , and the Imperials harried the retreating vessels while " Defiant " used its GAM to confuse fleeing Yuuzhan Vong warships . When the Imperials discovered that a third of the retreating Yuuzhan Vong fleet had split off and was heading for the Imperial Remnant planet Yaga Minor , " Defiant " and multiple other Imperial capital ships were dispatched to aid Moff Kurlen Flennic in defense . " Defiant " and the Imperial forces in that area succeeded in driving off the Yuuzhan Vong once again . Commanders and crew . " Defiant " was commanded by the elderly and irritable Captain Essenton , though Pellaeon admired her skill and resolve when commanding " Defiant " during the Battle of Borosk . Lieutenant Arber also served on the ship and was responsible for the gravitic amplitude modulator during the fighting at Borosk . Behind the scenes . " Defiant " appeared in the 2003 novel " " , written by Sean Williams and Shane Dix as part of " " series . The Star Destroyer later received an entry in " The Complete Star Wars Encyclopedia " , published in 2008 .