"It seems as if Zaarin has developed some dangerous plans, and we believe the Emperor to be in great danger. I want you to join me, Colonel, on an urgent mission. You have trained in the new starfighter. I want you to accompany me and break through Zaarin's lines. I must get to Coruscant immediately."
Immediately after the death of Xizor around 3.5 ABY,[2] Vader discovered that the remnants of Harkov's fleet had fled to the Ottega system and traveled there aboard the Imperial I-class Star DestroyerGarrett to oversee its destruction.[1] Seeing his opportunity, Zaarin began to move his own fleet to Imperial Center.[4] Meanwhile, the Grand Admiral dispatched several Assassin-class corvettes to the Ottega system, ostensibly to reinforce Vader's own forces, but with orders to attack the Garrett upon arrival. Though the Garrett survived the attack, it suffered critical damage. With the Garrett unable to return to Imperial Center in time to stop Zaarin's coup, Vader selected ColonelMaarek Stele to lead a group of prototype TIE Defenders on a mission to stop any attack on the Emperor, taking one of the starfighters for himself. Despite an ambush by Zaarin's forces in the Parmel system the TIE Defender group was able to rendezvous with the Nebulon-B2 frigateOsprey, before proceeding on to the Coruscant system.[1]
Bringing his flagship, the Imperial-class Star DestroyerGlory, to the Coruscant system, Zaarin caught the Emperor in his private ship, the Imperial I-class Star Destroyer Majestic.[1] With Lyn's assistance, Zaarin was able to catch Palpatine unaware[2] and his forces disabled and boarded the Star Destroyer,[1] using Lyn's Force powers to nullify the Emperor's own powers until he was in custody.[5]
Vader and Stele soon entered the system with their TIE Defender group and promptly received a distress signal from the Majestic. Moving toward the ship, the group detected the launch of six Delta-class JV-7 escort shuttles from Haven and Hellcat groups, carrying the troopers from Zaarin's boarding party, along with the captive Palpatine. As they moved to intercept, Vader instructed Stele to identify the shuttle carrying the Emperor.[1] After determining that Palpatine was aboard Haven 3, Stele joined his wingmates in engaging the other shuttles, choosing to leave Palpatine's shuttle until it could be disabled without fear of damage. Once they were destroyed, Stele dispatched his group toward the waiting Glory while he used his ion cannons to disable Haven 3.[3]
With Palpatine's shuttle disabled, the loyal Imperial Assassin-class corvette Mescue arrived in the area to board the vessel and rescue the Emperor. At around the same time, the badly damaged Majestic was able to escape into hyperspace. With the situation turning against him, Zaarin responded by launching TIE Avengers to assist, but Stele's group moved to engage them. The TIE Defenders eliminated the attacking TIEs, losing all but Stele and Vader in the process. Around the same time, Vice AdmiralThrawn arrived in the Imperial I-class Star Destroyer Vanguard to assist the Imperial forces and began launching TIE bombers to attack the Glory. Around ten minutes after Vader's group arrived, Palpatine was safely aboard the Mescue and Stele joined the TIE bomber attack on the Glory. Seeing that his coup had failed, Zaarin fled into hyperspace. Palpatine was taken to a secret location while Imperial forces planned their pursuit of Zaarin.[3]
The Emperor had been rescued but both Zaarin and Lyn had escaped.[3][6] Stele was rewarded for his part in rescuing the Emperor in a ceremony attended by the cream of Coruscant society[3] at the Imperial Palace. As the Emperor watched from high above, Stele was presented with the Emperor's Will medal[1] by Lord Vader.[3] The Emperor continued to take great interest in Stele, instructing the Secret Order of the Emperor to train Stele in the Force, and the pilot went on to become an Emperor's Hand.[6]
Thrawn pursued Zaarin into hyperspace and began a long campaign to defeat the rogue Imperial, who focused on gaining technological superiority with starfighters, first by attacking in the Omar system, before Thrawn drove him to the Outer Rim Territories and eventually the Unknown Regions. Zaarin later made a second unsuccessful attempt on Palpatine's life, before he was ultimately defeated by Thrawn.[1] Thrawn was promoted to the rank of grand admiral, taking Zaarin's place in the circle of twelve.[7]
The battle was first featured in the 1994LucasArtsvideo gameStar Wars: TIE Fighter, in which players fly as Maarek Stele. The battle is depicted in the mission "Save the Emperor," the fifth and final mission of the game's seventh tour of campaign, "Treachery at Ottega." In TIE Fighter, which of the three shuttles in Haven group carries the Emperor is randomized. TIE Fighter: The Official Strategy Guide established that Palpatine was canonically aboard Haven 3 in its mission walk-through, which is presented as Stele's after-action report.
In the manuscript for the original version of Peña and Daniel Wallace's Star Wars Insider 66 article "Who's Who: Imperial Grand Admirals", entitled "Dirty Dozen: Imperial Grand Admirals", more information is given about the battle than in the final version. The article indicates that Zaarin's timing was motivated partially by a desire to strike before Grand Admiral Martio Batch's TIE Phantom project took away his technological advantage, and that Lyn was not alone in pacifying the Emperor but was aided by her pupils.[9]