Eternal Alliance The Eternal Alliance , or simply the Alliance , was a military organization formed by the Outlander . The Alliance was initially a resistance movement to the formerly dominant Eternal Empire and sought to overthrow the tyrannical Emperor Arcann , and later Empress Vaylin . Eventually defeating both Arcann and Vaylin , the Alliance would seize the throne after defeating the last forces of the Empire in the Battle of Zakuul . The Alliance would then be reorganized by the Outlander , and transformed into the Eternal Alliance . All military assets of the Eternal Empire , including its enormous fleet , would be absorbed into the Alliance . With control of the Eternal Fleet , the Alliance was a force to be reckoned with and was considered the most powerful faction in the galaxy . History . Founding . Following the Battle of Asylum , elements from both the Galactic Republic and Sith Empire realized that the Eternal Empire was not invincible . The movement was initially organized by the individual known as the Outlander on the planet Odessen , a force - neutral planet making it a perfect place for an alliance between the light side - aligned Republic and dark - side aligned Empire , whereupon a fortress was constructed on the base of a cliff which would serve as the Alliance ' s base of operations during the coming war . Although the resistance movement started small , it gradually grew into a larger force , consisting of individuals from both the Sith Empire and the Galactic Republic , such as Theron Shan , Lana Beniko , Major Pierce , Bey ' wan Aygo , Hutt doctor Juvard Illip Oggurobb , and Hylo Visz , among many other specialists . Once the Alliance established itself as a force to be reckoned with , the Outlander was named the commander of the organization , and ultimately helped it grow in strength as well as lead a series of tactical strikes against the Eternal Empire ' s Star Fortress es . Initial strikes . The GEMINI Deception . The first objective the Alliance targeted was the Eternal Fleet . Subsequently , collaboration with Kaliyo Djannis and Havoc Squad enabled the Alliance to locate a hyperwave relay station beneath the Spire that transmitted orders to the Fleet . Kaliyo and Havoc Squad attempted to infiltrate the Spire to reach the relay station but were forced to flee , but not before obtaining a datacore on the GEMINI droids that ran the Fleet . Analysis of the datacore revealed the existence of the GEMINIs template , GEMINI Prime , hidden in a factory on Darvannis . To acquire the droid , the Alliance worked alongside Mandalorians to besiege the factory . After acquiring the Prime , SCORPIO determined that GEMINI Prime could take control of the Eternal Fleet if she were plugged into the captain ' s chair of one of the ships . The Commander personally led a boarding party to seize one lone ship , but SCORPIO double - crossed the Alliance , seizing control of Zakuul and most of the Eternal Fleet for herself while exposing Odessen ' s location to Arcann . Battle of Odessen . With their location exposed , the Alliance fought in defense of their base , with only the " Gravestone " facing off against Arcann and the Eternal Fleet ships under his control . The Outlander led a boarding party aboard the " Eternal Flagship " to defeat the Emperor and disable the Flagship , even as SCORPIO seized control of Arcann ' s ships to eliminate both her enemies at once . The Commander succeeded in defeating Arcann and left him for dead , only for his mother Senya Tirall to betray the Alliance to rescue her son and fled the system . The " Gravestone " soon wiped out the Eternal Fleet , saving the Alliance from destruction . With their victory over Arcann , Republic and Imperial forces from across the galaxy defected to join the Alliance . Invasion of Voss . Despite Arcann ' s defeat , the Alliance faced a deadlier opponent in his sister Vaylin , who assumed the throne with SCORPIO becoming her advisor and began scouring the galaxy for her family . Eventually , the Alliance came to the defense of Voss when the Eternal Fleet launched an all - out attack . The battle ended when the Sith Empire intervened , sending the Fleet into retreat . Attempted Coup . In light of Empress Acina ' s aid , the Commander traveled to Dromund Kaas to discuss an alliance against Zakuul . However , some time after arriving , both the Commander and Empress reportedly died in a shuttle crash . Subsequently , former Republic Supreme Chancellor , Leontyne Saresh , offered to step in and lead the Alliance . Aygo desired to send her away but the lower - ranking troops wanted to hear her out , uncertain how the Alliance would continue without their leader . However , just as Saresh began her speech , the Commander returned to Odessen alive and well , having survived being assassinated by the GenoHaradan , who were sent by Saresh in her bid to take control of the Alliance , and put an end to her attempted coup . Retaking the " Gravestone " . The Alliance later answered a distress call from Captain Koth Vortena aboard the " Gravestone " , which had been boarded by Vaylin and SCORPIO . The Alliance fleet engaged the Eternal Fleet once more while the Commander and their inner circle attempted to retake the " Gravestone " . Unfortunately , after the Commander disabled the quantum bomb aboard the " Gravestone " , SCORPIO seized control and took it and the Eternal Fleet to their homeworld of Iokath . To the Alliance ' s relief , the Commander managed to survive Iokath and returned to Odessen with the " Gravestone " . The Alliance soon began upgrading the " Gravestone " with the aid of datafiles recovered from Iokath . Operation Dragon ' s Maw . With Vaylin having retaken control of the Eternal Fleet from SCORPIO , the Alliance resolved to put an end to her rule by collaborating with local Zakuulan rebels led by Indo Zal . The Commander , along with Theron Shan and Lana Beniko , infiltrated the Grand Festival of Empress Vaylin in an attempt to get close to assassinate Vaylin . The operation became complicated when Arcann independently led an assault on the Palace of the Eternal Dragon with a group of loyalists and ultimately , Vaylin fled Zakuul in disgrace . Second Battle of Odessen . The Commander later pursued Vaylin to Nathema , where the Empress managed to break her mental conditioning before launching an all - out assault on Odessen . The Alliance once again held their own against the Eternal Empire ' s onslaught before the Commander managed to kill Vaylin , sending the Eternal Fleet into retreat and her ground forces into surrendering . The battle resulted in heavy casualties for both the Alliance and Eternal Empire , but these losses would turn the tide of the war , with an Alliance victory almost certain . Battle of Zakuul . Unfortunately , without a master , the Eternal Fleet began to rampage across known space with the intent of wiping out all life . With no other recourse , the Alliance fleet , with the " Gravestone " at its head , traveled to Zakuul , where the Fleet was bombarding the planet and protecting the Eternal Throne . While the Alliance kept the Fleet preoccupied , the Commander attempted to access the Throne from the surface . Once the Commander assumed control of the Throne , the Fleet became pacified . Reformation . With the Eternal Fleet under control and the Royal Family of Zakuul defeated , the Commander announced to the entire galaxy the dissolution of the Eternal Empire and the Alliance ' s reformation as the Eternal Alliance as a new galactic power . However , despite this victory , the Republic and Sith Empire began preparing for war and rogue factions across the galaxy initiated their own uprisings in response to the Eternal Alliance ' s rise to power . Battle for Iokath . When radiation levels ceased to sustainable conditions , Lana Beniko scouted the planet Iokath for a supposed superweapon , later proven to be quite real and a massive threat . However , before she could investigate further , Republic scout fired upon and destroyed her probe droid , and then engaged unknown Imperial scouts . While the two battled , the Eternal Alliance set up a massive base camp , heavily defended , with the Eternal Fleet overhead , only with its weapons deactivated . When the Alliance Commander arrived , the Eternal Alliance was choked in a newly spawned war on the planet between the age - old enemies of the Galactic Republic and Sith Empire . Trying to focus on the objective at hand , the Commander gathered allies to a throne where the secrets of Iokath laid . However , the throne was reached by one of the powers leaders first , who then attempted to release the superweapon , as well as 5 others later revealed . But they were overtaken by Iokath ' s hidden power and were killed in the process of learning such power . While a tragic moment , this freed the Eternal Alliance ( as well as Sith and Republic ) fleet . The Commander then ordered Eternal Fleet ships to fire upon the superweapon revealed to be a droid named Tyth , not before it firing and destroying an Eternal Fleet warship first . The weapon retreated underground , where Alliance forces closed in , awaiting orders . The Alliance Commander formed a special operations team and engaged Tyth soon after , destroying it . But the Commander did gain a power cell from Tyth , and gained the ability to create more droids like him for the Alliance , something both the Republic and Empire feared but could not prevent , being preoccupied with the quarrel against each other . Crisis on Umbara . Shortly after the battle on Iokath , the Alliance Commander was informed by Theron Shan and Lana Beniko that the traitor was on Umbara attempting to smuggle Adegan crystal s . With Theron and Lana at their side , the Commander raced to Umbara to catch the traitor . The Commander hijacked a moving train and fought their way to the front of it . The traitor then revealed himself as none other than Theron Shan . Theron explained his motives for why he betrayed the Alliance and desired to topple it . He told the Commander how he thought the Alliance would be different than the Eternal Empire . Theron escaped the train on a speeder while the Commander and Lana jumped before the train could crash . Stranded in the Umbaran wilderness , the Commander and Lana fought against local Umbarans and wildlife while also collecting Adegan crystals to enhance the Alliance ' s weaponry . Eventually , Theron escaped and the Commander , along with Lana , fought against an Umbaran Spider Tank . Back at the Alliance Base , the Commander was informed by Lana that she had her agents looking for Theron and assessing how much damage he inflicted from the inside . The Commander then sent a galaxy - wide message to Theron . Meanwhile , a mysterious figure welcomes Theron to the Order via holomessage . Military . During the beginning of the Alliance , their forces were composed of volunteers from the Sith Empire , Galactic Republic , Jedi , Sith , and among many others opposers to the Eternal Empire . The Alliance military was led by former Republic Admiral Bey ' wan Aygo , but was under direct control of the Alliance Commander at all times . Navy . At first , the Alliance Fleet comprised of the privately owned ships of those who donated their resources to the effort . It wasn ' t until after the first Battle of Odessen that Thranta - class and Terminus - class cruisers left their respective factions and joined the Alliance . The ancient frigate known as the " Gravestone " was the Navy ' s flagship , headed by Captain Koth Vortena . Following the Battle of Zakuul , the Alliance Navy greatly expanded with the Eternal Fleet being commanded by the Alliance Commander , making the Eternal Alliance the holder of the most powerful Navy in the galaxy . By absorbing the entirety of the Eternal Empire , many considered the Eternal Alliance as the dominant power in the galaxy , surpassing even the Galactic Republic and Sith Empire . Army . The Alliance Army consisted of former Republic and Imperial citizens and soldiers , Jedi and Sith , along with Voss Mystics to keep the two longtime enemies cooperative , smugglers and pirates of all origins and backgrounds , Mandalorians , independent forces ranging from farmers to mercenaries , and later Zakuul ans . When the majority of Zakuul ' s armed forces joined the Eternal Alliance , the organization ' s original members were prejudice towards their former enemy . However , over time Zakuulans proved their dedication to the Alliance and showed that they were not necessarily supportive of their Emperors actions . With the Eternal Empires large dedication to military superiority , the Zakuulans made the Alliance ' s power and influence greater in nearly every aspect . On top of this , many Knights of Zakuul joined , along with the entire force of Skytrooper droids – and their manufacturing facilities – further enhancing the newly founded superpower . The Alliance Army also contained a special Recon Task Force , often led by the Alliance Commander themselves . It was made up of four highly trained , stealthy agents capable of eliminating powerful and dangerous threats . This squad was known to be sent ahead of a main Alliance force . Although part of the Army , they were directed by Alliance Intelligence .