Devastation of Uphrades In 3643 BBY , during the Cold War between the Galactic Republic and the Sith Empire , the Sith Lord Darth Angral devastated the planet Uphrades using the Desolator superweapon . The penultimate event of his campaign of vengeance against the Republic and the Jedi Order for the death of his son , Tarnis , Angral ' s attack on the agriworld of Uphrades was a way to test his newly - constructed weapon before using it to attack Tython , the homeworld of the Jedi . The Desolator weapon ravaged Uphrades ' surface and atmosphere , killing millions of civilians , and before departing for the Tython system , Angral dispatched a boarding team to destroy the medical frigate " Daybreaker " in order to eliminate any witnesses . Prelude . In 3643 BBY , the Sith Lord Tarnis was killed in a duel with a young Jedi Knight during the Cold War between the Galactic Republic and the Sith Empire . Tarnis , who had been working undercover as a scientist on the Republic superweapon initiative , had used his access to the Republic ' s superweapon projects to develop a method of combining the Death Mark laser , Shock Drum , and Planet Prison weapons into a single ship - mounted weapon capable of destroying a planet . Tarnis named the weapon the Desolator , and he sent his father , Darth Angral , copies of the design files during his attempt to use the Planet Prison against the Republic capital of Coruscant . Tarnis ' s plans were foiled when the Jedi Knight killed him in battle , causing Angral to embark on a campaign of vengeance against the Republic and the Jedi Order in response , and Angral dispatched his three Sith apprentices to capture the Republic ' s offworld weapon facilities across the galaxy . With Tarnis ' s design files , Angral constructed the Desolator weapon and installed it on his personal " Harrower " - class dreadnought , the " Oppressor " . The Jedi Master Orgus Din — a personal enemy of Angral and the former Master of the Knight who had killed Tarnis — attempted to sneak aboard the warship in the Alderaan system and kill Angral , but he was only able to install a tracking device before the Sith Lord captured and executed him . Angral then departed the star system , jettisoning Din ' s body into space , and traveled to the Uphrades system to test the completed Desolator weapon on the Republic agriworld of Uphrades . The devastation . Upon entering the Uphrades system , the " Oppressor " fired the Desolator at the planet , ionizing Uphrades ' atmosphere and trapping all starships on the surface . The Desolator was wreaking havoc on the planet through seismic vibrations when the Republic medical frigate " Daybreaker " arrived in the system , and the ship ' s crew watched as the final stages of the Desolator set Uphrades ' atmosphere on fire , and the planet tore itself apart . The attack on Uphrades wiped out the planet ' s 16 million inhabitants , leaving only a few hundred survivors scattered across the ruined surface of the world . Upon sighting the " Daybreaker " , the " Oppressor " dispatched boarding pods to capture the vessel and eliminate all witnesses . Satisfied that the weapon was operational , Angral ordered the " Oppressor " to depart for Tython , the homeworld of the Jedi Order . Aftermath . Not long after Angral ' s departure , the Jedi Knight responsible for Tarnis ' s death arrived in the Uphrades system , having followed the signal from Orgus Din ' s tracking device . Along with the Jedi ' s Padawan , Kira Carsen , and the astromech droid T7 - O1 , the Knight foiled the Imperial attack on the " Daybreaker " and rescued the ship ' s crew . The " Daybreaker " chief medical officer , Doctor Senessa , detected scattered life signs on Uphrades ' surface amid the widespread destruction , and she proposed that the " Daybreaker " land on the planet to give them aid even though the atmosphere would disable the ship . Despite the attempts of Dal , the " Daybreaker " captain , to bribe the Knight , the Jedi agreed with Senessa ' s proposal , and she took command of the vessel in order to aid the survivors . With the help of the " Daybreaker " crew , the survivors endured on Uphrades ' surface during the months that it took for the ionization of the planet ' s atmosphere to fade and allow rescue attempts . Upon learning of Angral ' s intent to target Tython , the Jedi and crew pursued the " Oppressor " to the Tython system and boarded the vessel while the Desolator was undergoing the lengthy charging process necessary to fire . With the " Daybreaker " scans of the " Oppressor " , the Republic scientist Doctor Nasan Godera located a flaw in the Desolator ' s power systems that allowed the Knight and Carsen to disable the superweapon by deactivating the " Oppressor " reactors . When the two Jedi confronted Angral aboard the " Oppressor " bridge , the Sith Lord revealed that he had attacked Uphrades to lure his son ' s killer into a final confrontation — but their battle ended with Angral ' s death and the destruction of both the " Oppressor " and the Desolator , ensuring that no other planet would suffer the fate of Uphrades . Behind the scenes . The superweapon attack on Uphrades first appeared in " " , a video game released by BioWare and LucasArts in 2011 , during the Jedi Knight - class mission " Uphrades . " Captain Dal presents a dialogue option in which players can convince Doctor Senessa to abandon the survivors , a choice that rewards the player with medical supplies , or choose to ignore his request and allow Senessa to take the " Daybreaker " down to Uphrades . This article assumes that the player chooses only the moral light - side options as a Republic Jedi Knight character , and it therefore assumes that Senessa takes command of the " Daybreaker " .