Duro / Legends Duro ( also known as Duros ) was the heavily polluted and depopulated homeworld of the Duros species . Located on the Corellian Trade Spine in the Core , the planet itself was mostly abandoned , mainly housing food processing plants . Most of the population lived in one of the twenty orbiting cities . Duro was also home to a large number of orbital shipyards . History . Pre - Republic . Duro was surveyed by the Columi in 100 , 000 BBY , but the Columi were not impressed and passed it off as a primitive failure , little knowing that the inhabitants of the world , the Duros , would become a space - faring species in the years to come . Under the Infinite Empire , Duro was a slave world , and helped create the Star Forge 30 , 000 BBY . Following a plague that struck the Rakata , the Duros rebelled in 25 , 200 BBY . The Duros then formed a hereditary monarchy . It was based at Ranadaast , a city named after Queen Rana Mas Trehalt , which fell into disrepair and was infested by criminals when the monarchy fell into decline . The monarchy declined due to the rise of corruption , and control by a merchant council . Several years after the fall of the monarchy , Duro became a member world of the Herglic Trade Empire , the most powerful government in the Core Worlds region at the time . Old Republic . Duros were interested in exploration and ventured off their homeworld to explore the galaxy at an early age . Hyperspace cannon s linked Duro with Coruscant , Corellia , and other Core Worlds . Having reverse - engineered the hyperdrive independently of the Corellians , Duro entered a Golden Age as a Core Founder 25 , 053 BBY under Queen Rana Mas Trehalt at the formation of the Galactic Republic . The monarchy was eventually abolished in favor of a collection of ruling corporations . The Duros High House became the government / legislature , and the Chief Representative Officer became the planet ' s head of state . At the same time , the Herglic Trade Empire fell with the formation of the new galactic government . The Duros colonized Neimoidia during their earliest wave of expansion , though the Neimoidians were considered a separate culture by 15 , 000 BBY . The Duros discovered Sneeve in the Kymoodon Era , Adner in 5000 BBY , and Koboth ( prior to 219 BBY ) . The following years the Duros abandoned the planet for space cities , and left food production and mining on the planet to automated systems ; however overdevelopment caused mass extinctions and pollution on the world . 3962 BBY , the planet itself was laid to near - total waste during the Mandalorian Wars , when the Mandalorian invasion fleet advancing on the Colonies and Core regions destroyed much of the world using thousands of Basilisk war droid s . Years of misery and rebuilding were ahead of the Duros people , merely the latest phase in the long series of Sith Wars . During the New Sith Wars , the Duros colony on Harpori was wiped out by Kaox Krul 1002 BBY . Rise of the Empire . Circa 220 BBY , during Duro ' s Industrial Age , the mining city of Tayana reached its height . In 200 BBY , the Tiercam Dam was built . During the Clone Wars , the Confederacy of Independent Systems launched Operation Durge ' s Lance in 21 BBY , a coordinated and major campaign that led to the capture of Duro . During the battle , General Grievous ordered an orbital bombardment of the surface . This resulted in the pollutants from the numerous factories which covered Duro ' s surface to be released radioactively , and the surface being rendered the uninhabitable wasteland that it would remain until being Vongformed years later . The swift success of the campaign sent shockwaves throughout the Galactic Republic , and even neutral Corellia began to tighten its defenses . Galactic Empire . The Galactic Empire collected what was left of Duro ' s natural resources , and forced many Duros to move off the planet . In an attempt to stir up conflict between Duro and Corellia , the Empire declared Duro to be part of the Corellian sector . With the Trade Federation nationalized , the disgraced Neimoidians began to reintegrate themselves into mainstream Duros culture . At some point , Darth Vader ' s secret apprentice , Starkiller , was sent to Duro to dispose of a local despot who had grown too over - ambitious . While the precise details of the incident are unclear , All - Terrain Scout Transports were used against the darksider , earning his unending hatred of the walkers . The space city Pellezara station , located near the planet in the Duro system , served as a maintenance stop over for freighters en route to Duro . In 1 BBY , the Rebels tried to free the planet but they were defeated at the Battle of Vnas . New Republic . As of 5 ABY , the prisoner Triclops was being held on Duro , courtesy of Grand Moff Bertroff Hissa . Triclops escaped and saved his son Ken from Hissa . Although the New Republic managed to save Duros archaeologists from the Valley of Royalty , the Valley itself was flooded with toxic waste when the Tiercam Dam burst . The New Republic eventually liberated the planet , and put the system back in the Duro Sector . Ecosystem purification teams cleaned up the planet ' s atmosphere as best they could . 11 ABY , in Operation Shadow Hand , Duro was retaken by the Empire , but eventually freed . 13 ABY , CorDuro Shipping took control of the Pri - Andylan shipyards . 25 ABY , Jedi Tresina Lobi and Thrynni Vae discovered CorDuro Shipping ' s ties to the Peace Brigade , resulting in the Brigade murdering Thrynni . Yuuzhan Vong Empire . 26 ABY , the New Republic attempted to make Duro habitable and settle refugees there , though their efforts were sabotaged by the Yuuzhan Vong agent Nom Anor . The Yuuzhan Vong conquered Duro and destroyed nineteen of its twenty floating cities . During their occupation , they managed to reverse centuries of pollution in just two years with their biotechnology . It was later raided by the New Republic , and again by the Galactic Alliance . Legacy era . After the war ' s end , Duro returned to its lush forested past being restored by the Yuuzhan Vong terraforming . During the Second Galactic Civil War Thrackan Sal - Solo had planned to conquer it to gain access to its baradium and cortosis . After the Battle of Caamas and the end of the Sith – Imperial War , a Duros Admiral named Gar Stazi led the remnants of the Galactic Alliance Core Fleet against the newly established Galactic Empire . Duro itself was subjugated by the Empire and was subject to a pervasive Imperial presence . An Imperial Academy was established in the planet ; in it the most talented Duros taught Imperial pilots and capital ship crewmen . Fauna . Eventually , due to millennia of pollution , the only remaining creature on Duro was the nonnative Fefze beetle , an aggressive mutation of the insectoid Fefze , a species recruited to work on Duro during the last decades of the Galactic Republic . Extinct creatures included the cannibal arachnid s . When the Yuuzhan Vong arrived on Duro , they introduced many of their own creatures and creations onto the planet . Behind the scenes . The PC game " " spells this planet " Duros . "