The rest of the system

New Duro is not the only planet on the Furan system, while none is as important as it is, some have... interesting places.

Mot

Mot is the closest planet to the Furan star, and it has little interesting going on. Because of it's extreme temperature and small size it was never colonized or terraformed. It's not devoid of activity, however, the Sylar Corporation initiated a mining operation over 150 years ago, and it's still ongoing thanks to the massive deposits of interesting radioactive materials on the rock. No one lives on Mot though, an army of specialized droids drills the planet day and night looking deeper and deeper for riches, and their organic masters only come once in a while to check that everything is fine.

Hohnir

When the explorers that discovered the system, they were stunned by how New Duro was thriving with life, usually worlds need some serious terraforming before being colonized, normally colony worlds are like Hohnir.
Hohnir is the second world from Furan, and it's close to being inhabitable but not just yet. The temperature is stabilizing, it's seas are forming nicely and there are already some basic lifeforms on it. Unfortunately, it's weather is erratic and devastating, it's seas acidic and the surface temperature is so high you need specialized suits unless you'd like to be well cooked.
That doesn't mean that Hohnir is devoid of sentient life, there are several habitats on the surface and orbit, mainly of scientists researching how the world is developing, and also several teams from corporations investigating if the planet could be used for some economic activity.

Tracyn

Not really a planet, but a Moon of the gigantic Vulcanus, a reddish gas giant that it's actually the fifth planet of the system.
Tracyn didn't have any inhabitants till the Mando's showed up in the Mandalorian wars, almost 600 years ago.
For the whole war, New Duro, originally though by the Mando's as an easy conquest in their war against the republic, held against an onslaught of Cruisers, Dropships and Basilisks thrown by Mandalore's armies. The defenders of New Duro still remembered the horrors of the Krath invasion, and were not about to let themselves be taken without a fight.
The respect of the Mando's for the planet grew immensely, and the invasion fleet tasked with taking over that branch of the Corellian Spine detached a third of it's forces just to keep the siege of New Duro, delighting themselves in seeing how long would the planet last.
To their surprise, New Duro never fell, they held their ground till Mandalore was felled in combat by Revan and Malachor V obliterated by the mass shadow generator.
With nowhere to go, the Mando's checked their options and decided that after staying for so many years on the system, they might as well make it their home. The called of the siege, retreated to one of their staging bases on one of the moons of Vulcan and negotiated a cease-fire with the FTA.
The FTA proved it's business savvy right there and then. They offered the Mando's a clean report towards republic forces as long as they made their services available to the FTA and New Duro in general. The Mando elders in the detached fleet joined and decided that there was potential in this deal, thought there were dissenting voices.
They dismantled most of their fleet and build a self-contained city on their staging base, now renamed Tracyn (fire in the Mando language) because of it's moving red sky, which seems always on fire; and started a series of droid factories and autoforges to rebuild their forces and equipment.
After their little place in the system had been carved, they formed Red Scythe (named after a Mando hero from the time of the mighty taung)with the blessing of the FTA, and offered their services as high-profile mercenaries and security forces, cleaning the Corellian Spine from the swats of pirates clogging them in the aftermath of the war. Ironically, many of this were Mando forces that refused to call off the war, though Red Scythe recruited many of them into their fold.
When the Revan-led Sith Fleet attacked the weak Republic, New Duro again showed it was not letting itself be taken, and this time, the Mandos added their strength to the battle on New Duro's side.
Revan was a brilliant strategist and instead of attacking New Duro head-on after seeing from some test attacks that defence was being fierce, he instead circled it and established a supply blockade, trying to wither it down while he tackled more pressing objectives.
During this time, Tracyn learned from their old neighbour and started building defence after defence, abusing the huge deposits of heavy metals on their moon and turning their small moon into an small self-sufficient fortress.
After that the war came and went, and the Mando's of Tracyn solidified their presence on the system, becoming engrained on the commercial disputes of New Duro, and keeping the system safe for an adequate price.
When the Great War came about the Mando's from Tracyn distrusted the call from the false Mandalore, but offered his armies weapons and fighters from it's autoforges. When the Sith Empire took Corusant, the Furan System was ceded to the Empire and the Mando's from Tracyn kept their commercial deals with the System's new masters.
However while business was good, their Sith employers were to insane and arbitrary, growing more and more violent towards the population of the system, Tracyn included, in their desperate attempts to quell the growing resistance movement. When the second Great War started and Republic forces did a push for the Furan system, Red Scythe aimed their guns at the Sith command ships and offed the Sith commanders in on the systems battlecruisers, taking it for themselves.
After accepting a contract from Republic command they proceeded to clean up the system from Sith and random bandits.

They stayed in this renewed position till modern times, right till before the Civil War erupted.

While there are dozens of clans represented on Tracyn, three clans have a special weight and control most of the council of elders. The clans are:

- Clan Kander: Something of a young mandalorian clan, they were formed out of different neo-crusader recruits in the Mandalorian Wars. The Clan structure is designed around the military structure of their original siege unit, and it's mostly compromised of Humans, since they were the majority and the ones that had it easier to find mates and procreate.
They are the biggest clan in the system, and control most of Red Scythe. Their fortress city, Cabur, is the nominal capital of the moon. It's a huge fortress that in the distance appears like 5 spikes protruding from the ground.
The Clan elder is Parjai Kander, an old but still powerful warrior that most of the clansmen look up to, even if they disagree with him. He's a staunch defender of the Status Quo, believing that with their current way the clans under his protection have thrived, found battles and survived in the face of difficult odds.

- Clan Stormcaller: A mainly Togorian clan, not quite as populous as clan Kander, but because of their long line of ferocious and powerful warriors, rank second in power in the politics of Tracyr.
Clan Stormcaller nominally supports the current stance of Parjai Kander, and consider him battlemaster, however, more and more dissenting voices in the clan claim that they should launch a crusade or at least an small war, in search of proper battles and honor, instead of working as overpaid policemen.
Murrar Stormcaller is the clanmaster. He's a huge, elder togorian that could probably split a man in two just with his hands. He has a fame for being unstable and violent, but surprisingly cool under fire and with a keen tactical mind that his appearance hides well. He was defeated decades ago by Parjai in the ring of honor, were he swore loyalty to him as battlemaster. Some of the voices of the younger and more rowdy generation say that the duel should be rematched, as many would prefer the aggressive Murrar as leader.
[Unfinished, will finish at a later date]