Alderaan Civil War The Alderaan Civil War was a conflict on the planet Alderaan that was fought during and after the Cold War and Galactic War . Prelude . After Alderaan was invaded by the Sith Empire during the Great Galactic War , which was eventually repelled and obliterated by the Galactic Republic , the leaders , for the first time in history , became a voice for aggressive military action in the Senate . After the Treaty of Coruscant was signed , Senator Gaul Panteer , the crown prince of Alderaan , marched out of the Senate chamber in protest . Alderaan seceded from the Republic , and became an independent system . The decision of the crown prince was met with mixed reaction by the Alderaanian people ; though many were supportive , others were outraged . Despite the controversy , the Alderaan security forces managed to keep order until the crown prince was assassinated ; just days later , the Queen died heirless . The Alderaanian Parliament was deadlocked on which of the noble houses should inherit the throne . Civil war erupted when House Thul , backed by the Sith Empire , decided to settle the matter by force . The conflict . The civil war ceased to be internal when a forgotten and exiled House Thul returned with Imperial backing and the Republic started funneling support to the House Organa . Even though neither superpower officially had any troops on the ground , Alderaan became a site of conflict between them in the post - war galaxy . Bouris Ulgo protested House Thul ' s return , stating that they ' re just puppets for an Imperial invasion , and attempted to rally the other houses to expelling Thul once more . But as the houses were too fractured to realize it , Ulgo decided to take action by usurping the throne from the Panteers . This only caused all the houses , excluding House Rist , to turn against him as well . There were ongoing peace talks between the Houses at a secret location , but the Jedi envoy , Sidonie Garen of House Organa was infected with a madness plague , and she nearly escalated the war further until Yuon Par ' s Padawan , the future Barsen ' thor , as envoy to Teral stopped her . The Barsen ' thor then negotiated the summit to agree to a truce and to reconvene at a later date . The Hero of Tython also helped to preserve talks between houses Thul and Organa by saving the life of the Head of House Thul from the Death Mark superweapon , utilized by Lord Nefarid to escalate the conflict . The smuggler Ace , later known as the Voidhound was on a mission to deliver items given to him by Risha Drayen to get a hyperdrive which would take them to the lost treasure of Nok Drayen , the crime lord . The Commander of Havoc Squad , Meteor was on a mission to locate and defeat Bex Kolos , and with the help of Colonel Jace Malcolm , he eventually succeeded . Eventually , Bouris Ulgo was captured by an elite strike team . It was later discovered that Houses Ulgo and Rist were behind Gaul Panteer ' s death . During the civil war and the later Galactic War , a rakghoul outbreak was also destroyed by The Hyland Organization for Rakghoul Neutralization ( THORN ) and its supporters . Despite Bouris Ulgo ' s death , the civil war continued into the Galactic War and even after , during the Eternal Empire ' s domination of the greater galaxy . Arcann ' s empire actively aggravated the conflict , undermining any peace talks through sabotage so that the Alderaanian government would be too unstable to form a resistance against the Eternal Throne . With the help of Choza Raabat , though , the Outlander destroyed the Star Fortress in orbit of Alderaan , the primary source of Zakuulan troops on the planet . With it removed , Raabat believed that the planet could begin rebuilding from the decade - long conflict . Behind the scenes . Alderaan Civil War is also the name of a Warzone in the game " " . Set on Alderaan during the civil war period , Republic and Imperial teams fight to control heavy laser cannons in a strategic battlezone , hoping to use those cannons to destroy the opposing faction ' s troop transport .