Battle of Dellalt ( Galactic Civil War ) The Battle of Delalt , possibly also known as the Battle of Dellalt , was a space battle between the Alliance to Restore the Republic and the Galactic Empire . Four Rebel squadrons — Blue Squadron , Gold Squadron , Rogue Squadron , and Red Squadron — mounted a starfighter attack on the " Victory " - class Star Destroyer " Formidable " in the Delalt system . The Battle . Two Rebel squadrons ( Blue and Gold ) were equipped with RZ - 1 A - wing interceptors , updated versions of the R - 22 Spearhead piloted by Keyan Farlander on his reconnaissance mission in the star system about three years earlier . The other two squadrons ( Rogue and Red ) flew T - 65 X - wing starfighter s armed with a pair apiece of advanced proton torpedoes and given the role of attacking the " Victory " - class Star Destroyer . All four squadrons entered the system about a minute out of warhead range from the " Formidable " , which began locking onto the starfighters with its concussion missile launchers and shooting missiles at them from out of range . The " Victory " - class Star Destroyer also deployed its complement of TIE / IN interceptors , the pilots of which might have judged the opposition to be too fierce and called for reinforcements from Tau Squadron , which was on standby in Assault Gunboats nearby . As the " Formidable " was well equipped to counter starfighter attacks and its TIE pilots attacked with ferocity , to say nothing of the meager half - load of warheads allotted to the Rebel strike force , it is probable that at least one flight group from Green Squadron , another X - wing outfit based in the sector , arrived on - scene to assist in the attack . Eliminating the " Formidable " was critical to the Alliance , but the Rebels could not afford to lose more than two - thirds of their starfighters in the engagement . It was the task of the " Formidable " ' s TIE interceptors to inflict heavy casualties and drive the Rebels into retreat , or at least to stave off the destruction of their command ship until the Imperial Nebulon - B frigate " Fury " could arrive to render assistance . The Battle of Delalt was apparently the final engagement of . Behind the scenes . As players can participate in the mission " Attack on Victory - class Star Destroyer Formidable " in the computer game " " on either the Rebel or the Imperial side , both sides have conflicting mission objectives , and victory is not essential to access the next set of missions , the battle itself is considered canon but the canon outcome is unknown . The ships listed in this article are those found in the battle Imperial Fleet Operation : Clean Sweep , using the default craft assigned to the player . The " Delalt " system named in the mission description and briefings for " Attack on Victory - class Star Destroyer Formidable " is more than likely the " Dellalt " system featured in " " . Both the Caluula sector and the unnamed sector containing the system featured in this mission were apparently either under Rebel Alliance control or contained a heavy Rebel presence during at least part of the time between the Battle of Turkana and the Battle of Endor , and it seems unlikely both that the Rebels would control two different sectors containing star systems with such similar names or that the game designers of " X - wing vs . TIE Fighter " , many of them carried over from the team behind " X - wing " , would intend the two to be separate systems . The battle was evidently the last of the Imperial Operation : Clean Sweep , suggesting that the " Formidable " was in the system ( which the Rebel mission briefing refers to as in " our Sector " ) conducting an offensive , as a Rebel counterattack after the Imperials had concluded the operation would probably not be considered to be its final battle ( unless it was so decisive as to force the Empire to abort the operation , which seems unlikely even assuming the total destruction of the " Formidable " , the " Fury " , and all Imperial starfighters in this battle ) .