Mission above Imperial City In 7 ABY , the New Republic starfighter unit Rogue Squadron flew a mission above Imperial City to eliminate remaining elements of the Palpatine Counter - Insurgency Front in the wake of the Krytos virus incident on the planet Coruscant . As the battle above Imperial City raged , Director of Imperial Intelligence Ysanne Isard blasted away from the planet in the Super Star Destroyer " Lusankya " , previously buried beneath the city surface , killing millions of innocent civilians . The mission . In an attempt to provide cover for his impending defection , Palpatine Counter - Insurgency Front leader Kirtan Loor ordered his troops to attack a bacta storage facility in Invisec . This also served as a measure of personal revenge against Fliry Vorru , who controlled the facility . Vorru , however , recognized the signs of the impending attack , and informed Borsk Fey ' lya . Fey ' lya in turn arranged for Rogue Squadron and a commando squad to thwart the attack . At the PCF base , several civilian airspeeders and a trio of All Terrain Scout Transports were discovered , along with PCF ground troops . The walkers and troops were quickly eliminated , but a single heavily - laden airspeeder , which Wedge Antilles realized contained the bomb meant for the bacta facility , managed to escape . With the aid of observers on an orbital skyhook , Antilles chased down the airspeeder and managed to destroy it before it could reach its target . At that time , a much greater threat emerged near the Manarai Mountains . Three squadrons of TIE / LN starfighter s were launched toward the Rogues , and " Executor " - class Star Dreadnought " Lusankya " emerged from beneath Imperial City , propelled toward orbit by a massive repulsorlift platform . The gargantuan warship demolished every structure within over a hundred square kilometers , resulting in millions of civilian deaths . As it ascended into orbit , the " Lusankya " also destroyed a skyhook with turbolaser fire . The remaining TIEs rushed back to the Star Dreadnought , but only five of the original thirty - six survived the battle . Rogue pilot Erisi Dlarit , in pursuit of the TIEs , claimed to have been caught in a tractor beam . However , her R5 astromech refuted the claim , revealing that she had been an Imperial spy . While Rogue Squadron returned to base for refueling , the " Lusankya " continued to climb and turned its weapons toward Coruscant ' s planetary shields . The ship quickly punched a hole in the shields and passed through , and encountered a Golan III orbital defense station . The station quickly exchanged fire with the Super Star Destroyer , but the " Lusankya " jettisoned its repulsorlift platform , which absorbed much of the Golan III station ' s attack . The " Lusankya " then jumped to hyperspace on a course to Thyferra , where Isard quickly took control of the vital bacta - producing planet , with the full support of the Xucphra Corporation . Aftermath . In the aftermath of the battle , the New Republic Provisional Council was unwilling to intervene on Thyferra , as they feared interfering with the internal politics of a non - Republic world would cause severe political damage to the fledgling Galactic government . Following the lead of Corran Horn , every member of Rogue Squadron resigned in order to stage their own independent effort to overthrow Isard , thus allowing Antilles to keep his promise to Ashern member Qlaern Hirf . The conflict which followed was known as the Bacta War . Nonetheless it was the result of this battle that the New Republic substantially replaced the Galactic Empire as the pre - eminent government of the galaxy , since they had successfully claimed the generally recognized Galactic capital .