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The Siege of Inyusu Tor was a battle that occurred during the Galactic Civil War between the Alliance to Restore the Republic's Sixty-First Mobile Infantry and the Galactic Empire on the volcanic planet Sullust.


Shortly following the Battle of Hoth, the Sixty-First Mobile Infantry—commonly known as Twilight Company—initiated Operation Ringbreaker. Devised by the former Governor Everi Chalis it sought to force Imperial redeployments from the shipbuilding world of Kuat by assaulting worlds such as ObumuboNaator, Xagobah and the asteroid mines of the Kuliquo belt, thus allowing for them to eventually assault Kuat Drive Yards. Their assaults cost them many soldiers but it left them victorious. Following their sabotage of the Kuliquo belt asteroid mines, Twilight Company were left with Sullust and Malastare to attack.[1]

The SiegeEdit

Stranded on SullustEdit

"Twilight? This is the Promise. We've been ambushed—the whole blasted swarm came in from behind the moon. They were waiting for the Thunderstrike to hit atmo..."
―A female officer on the Apailana's Promise as Vixus Squadron ambushes the two ships[src]

The Sixty-First jumped out of hyperspace a mere half million kilometers from the planet in an effort to rapidly deploy drop ships to assault the Inyusu Tor mineral processing facility. The attack on the facility was successful and Twilight Company prepared for their pick up, rigging the facility to flood with lava. The pick up came the next day and went awry when the Imperial Vixus Squadron appeared from behind Sullust's moon and ambushed their troop transports. Twilight Company's CR90 corvette, the Thunderstrike, was shot down and its escort, the Dornean gunship Apailana's Promise, fled with its two X-wing starfighters, stranding Twilight Company on the planet.[1]

Preparing for the assaultEdit

Twilight Company needed help so their Captain, Hazram Namir, decided to reach out to the local sullustan resistance for help. He, his squad and Twitch, and her squad, went to the Sullustan capital of Pinyumb and found an abandoned safe house. As they searched around, Twitch's soldiers went down to the nearby spaceport but they were soon met by a squad of stormtroopers who chased them out. Twitch left them to find her squad and Namir was captured by the stormtrooper SP-475. The Sullustan resistance leader Nien Nunb then arrived and rescued Namir from SP-475 and her squad. Nunb took him to help feed hiding Sullustans and they soon got to the Sullustan resistance safe house where the other resistance members were.[1]

Namir realised that the group of four freedom fighters would be of no help but devised a plan: it would have the Sixty-First face the inevitable Imperial attack on Inyusu Tor and have the Sullustan resistance and willing members of the Cobalt Laborers' Reformation Front take Pinyumb. Namir went back to Inyusu Tor and saw that Chalis wanted to have the Sixty-First evacuate and continue Operation Ringbreaker and had already begun her plan. Namir insisted on his plan and the Besalisk Gadren captured Chalis, thwarting hers. Namir therefore prepared the Sixty-First for the coming attack.[1]

Defending the facilityEdit

The next three days would result in the bloody siege of Inyusu Tor, being in the Empire's favour as the Imperial-class Star Destroyer Herald arrived in the system and the Imperial Army utilised overwhelming force to surround the rebels on the mountainside facility. Twilight Company formed three defensive lines with the outer housing various squads hiding behind boulders and slopes, the middle housing a more organised groups of firing squads and the inner housing soldiers and artillery for the All Terrain Scout Transports the enemy had. Meanwhile in Pinyumb, the Sullustan resistance rallied members of the Cobalt Laborers' Reformation Front to rise up in Pinyumb and they were able to mount a fierce resistance.[1]

The Herald began to bombard the outer defensive positions, killing many Twilight snipers and scouts. Its cannon volleys closed in on the facility but were halted by the return of the Apailana's Promise which kept it distracted. As the defensive lines were pushed back, Twilight Company's chief of engineering, Vifra, and her team used machines donated by the Sullustan resistance to excavate ports for the facility's lava to flow towards the ground forces. The lava trapped the Imperial forces and killed many that couldn't advance fast enough on the facility. However the battle could not be won with the Herald still at play.[1]

During the battle, Chalis fled to the nearby city of Pinyumb, killed an Imperial officer, and attempted to escape the planet in a shuttle. Before she was able to leave the atmosphere, the Herald locked onto the shuttle with its tractor beam. After being taken prisoner, Chalis revealed the shuttle had been rigged with ion charges and activated them, dealing major power loss to the Star Destroyer. Unable to power its weapons and maintain altitude, the ship began to drop towards the surface and was forced to leave the system. Even without the Star Destroyer's help, the Imperial ground forces stayed strong and stormed the facility. The fire fights led to the deaths of many on both sides including the Twilight soldier Roach. However the Imperial numbers rapidly deteriorated and they were ultimately defeated.[1]


Pinyumb was taken by the joint force of the Sullustan resistance and the Cobalt Laborers and in the following days more uprisings broke out all over Sullust, delaying the inevitable Imperial counterattack. An interim government was installed in Pinyumb and heavy losses sustained by the Twilight Company ultimately cancelled Operation Ringbreaker, allowing the company to act as a temporary police force for the Sullustan people.[1]

The victory on Sullust ultimately played a key role in the outcome of the Galactic Civil War, as the planet was eventually used as the staging ground for the Alliance Fleet before the Battle of Endor.[4]

After the battle the Alliance returned to liberate Sullust completely.[3] Sometime later, the Empire returned to the planet and reactivated an abandoned weapons factory, in an effort to covertly resupply their dwindling forces. The installation was destroyed by Lando Calrissian and Shriv Suurgav, shortly before the Battle of Jakku.[5]



Notes and referencesEdit

Galactic Civil War
(0 BBY5 ABY)
Galactic timeline

Previous: Early rebellion against the Galactic Empire · Jedi Purge · Jedha insurgency

Concurrent: Campaigns of Saw Gerrera's Partisans · Ryloth insurgency

Next: Cold war

Battles of the Galactic Civil War
0 BBY Scarif · Tatooine (I) · Operation Mad Rush (Vir Aphshire) · Death Star · Yavin
0 ABY Taanab · Yavin 4 (II) · Alderaan survivors · Cyrkon · Llanic
Rodia · Denon · Giju · Tertiary Usaita system · Devaron · Tibrin
Kuat (I) · Imdaar · Cymoon 1 · Tatooine (II) · Monsua Nebula
Nar Shaddaa · Vrogas Vas · Coruscant (I) · Sunspot Prison · Ghost Moon · Harbinger · Tureen VII · Skorii-Lei (II) · Grakkus · C-3PO · Ocean planet · Akiva (I) · Horox III · Hera Syndulla · Hivebase-1
1 ABY Mako-Ta · Hubin · Novka
Mid Rim Retreat (Phorsa Gedd · Bamayar · Haidoral Prime
Coyerti (Imperial scout post · Imperial fort · Distillery · Imperial garrison)
Enrivi system · Chonsetta system · Redhurne system)
3 ABY Rebel flotilla · Hoth (I) · Cloud City (I) · Cloud City (II)
Operation Ringbreaker (Mardona III · Najan-Rovi · Obumubo · Nakadia (I) · Naator · Xagobah · Kuliquo belt · Inyusu Tor)
4 ABY Rebel convoy · Hudalla · Operation Yellow Moon · Invincible Faith · Platform M36 · Endor (I) · Durkteel · Coruscant · Endor (III)
Beltire · Cawa City · Operation: Cinder (Fondor (I) · Naboo (I) · Nacronis · Abednedo (I))
Tayron · Iron Blockade (Bespin · Anoat (I) · The Crypt · Mataou · Hoth (II) · Anoat (II)) · Malastare · Jiruus
Oridol Cluster · Abednedo (II) · Haldeen sector · Hunt for Shadow Wing (Pandem Nai)
Akiva (II) · Naalol · Geonosis · Uyter · Sevarcos · Akiva (III)
5 ABY Vetine · Takodana · Hyborean Moon · Vorlag · Wild Space
Nag Ubdur (Govneh Ridge · Binjai-Tin) · Arkanis · Kuat (III)
Kashyyyk · Chandrila (I) · Chinook Station · Sullust (II) · Naboo (II)
Fondor (II) · Jakku
Other Accresker Jail · Asyrphus · Beroq 4 · Blacktar Cyst · Chargona · Crait · Gorma · Jedha · K43 · Kiax Nebula · Kuat (II) · Lanz Carpo · Magnus Horn · Mon Cala · Mek'tradi · Nakadia (II) · Nebulon-B frigate · Pirate station · Primtara · Rebel fleet · Sergia · Shu-Torun · Skorii-Lei (I) · Sullust · Operations on Tatooine (Atom Edge · Imperial Listening Station · Operations against the Empire · Tatooine (III)) · Thila · Trenchenovu
Related topics and articles
Galactic Empire · Hutt Clan · Jedi · Rebel Alliance · Sith · New Republic
Death Star · Death Star II · Imperial Senate · The Disaster · Yavin 4 (I) · Endor (II)
Liberation Day · Contingency · Chandrila (II) · Galactic Concordance · Imperial Instruments of Surrender

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