Name: Ziost
Region: Outer Rim Territories
Sector: Esstran sector
System: Ziost system
Moons: 2
Grid coordinates: R-4
Primary terrain: Arid, Frozen Mountains
Points of interest: Orbital Defense Command Center, Ministry of Logistics, Sith Citadel
Fauna: Vine cat
Immigrated species: Sith, Humans
Primary language(s): Sith, Galactic Basic Standard
Major cities: Sith Citadel, New Adasta

Description: Ziost sometimes referred to as the "Gateway to the Empire" in the days of the Old Republic, was a world made up of ancient dark forests and barren tundra. However, the trees withered away and the planet became very similar, in landscape, to Korriban. Much of the planet was covered in ice. Not only was it a focal point of the dark side, but it was also the adopted homeworld and Imperial capital of the Sith species, who left their original homeworld, Korriban, as a graveyard world after the death of their leader Adas.

Eventually it became a major Sith buffer world during the days of Vitiate's Sith Empire before being forgotten entirely.

History
A new homeworld
Ziost became the capital of the ancient Sith Empire after the reign of the Sith Overlord Adas came to an end. Without his unifying force holding them together, the Sith degenerated into their previous feudal ways. After centuries of battle and strife, the remaining Sith utilized Rakatan vessels to relocate to other planets, leaving their desolated homeworld Korriban as a vast graveyard world populated by religious fanatics who would, thousands of years later, be subjugated by the Jedi Exiles, forming a new Sith Empire. By the time of the Great Hyperspace War, Ziost remained a key planet within the Empire, but following the Republic's victory, it was abandoned, the remaining Sith following the new emperor into hyperspace. A new Sith capital was established on Dromund Kaas, which left Ziost forgotten. At some point during this era, Ziost had also suffered from an Ice Age that had changed the world's terrain and climate.

The Old Republic
Eventually, the planet was resettled by the new empire, once again becoming a major Sith holding. It served as capital of Imperial buffer space and, eventually, housed the Orbital Defense Command Center, headquarters of the Ministry of Logistics. The city of New Adasta was established on the surface of the planet by Imperial forces to serve as the world's capital, quickly overshadowing the Sith Citadel, political center of the Old Empire. The city quickly became a major trade hub, leading to the planet's being nicknamed the "Gateway to the Empire." During Operation End Game, Theron Shan visited the planet, where he infiltrated the Orbital Defense Command Center in New Adasta to steal a Black cipher from Minister Davidge's executive office. By the time local officials found out, the agent was already long gone.

In spite of the harsh defeat as a result of Shan's cunning and local security's inability to protect the cipher, the planet remained a key world throughout the duration of the Galactic War.

Following the defeat of Revan by combined Republic and Imperial forces on Yavin 4, the resurrected Sith Emperor attacked Ziost in an attempt to regain control of the empire that he once ruled. He took the minds of legions of Imperial forces on the planet and used them to take the lives of many of the planet's citizens to fuel his own power. When the Republic took notice and sent the Sixth Line to Ziost to investigate, Vitiate forced their ship to crash-land on the surface and took the minds of most of the Jedi inside. At the same time, an Imperial task force led by the Minister of Sith Intelligence Lana Beniko arrived and attempted to stop Vitiate. Undeterred, he was able to consume Ziost, resulting in a barren, frozen wasteland which only left a few Monoliths alive. The atmosphere, however, remained breathable. Members of the Republic and the Sith Empire traveled to Ziost once more to gather information on what exactly had taken place.

Ziost's existence was once again forgotten after the Seventh Battle of Ruusan, due to the secrecy of Darth Bane's Sith Order. Many ancient and evil secrets remained on this place of great dark power. In 3 BBY, fugitive Jedi Rahm Kota visited Ziost while on the run from the Galactic Empire. The following year, Galen Marek came to the system during his search for Kota. A year after the Battle of Yavin, after being roused on Yavin 4 by the Rebel Alliance, the mutated Massassi Kalgrath came to Ziost hoping to find his people. He was disappointed, having found only a frozen waste.

Lumiya visited the planet and created her lightwhip using technology she found on Ziost. Following the Battle of Endor, she apparently trained her apprentices—first Flint and then Carnor Jax—on Ziost or possibly nearby Korriban.

Almost a decade later, the Jedi scholar Tionne set out to find Kalgrath. She traced his trail as far as Ziost, but there it disappeared. Another ten years later bounty hunter Zekk, ran into Dengar on the planet while the rival bounty hunters were searching for Bornan Thul.

At the time of the Second Galactic Civil War, Jacen Solo (overseen by Lumiya) dispatched Ben Skywalker to the world, supposedly to recover a Sith amulet, but in reality to test him against opponents, to see if he was worthy of becoming a Sith apprentice. After having an epiphany of sorts, Ben accompanied the stranded child Kiara Olvidan across the surface of the planet, led by mysterious voices to an ancient temple. Throughout his journey the young Jedi was attacked by neks and pirates orbiting the planet under the command of Byalfin Dyur. Ben escaped the planet eventually, finding an antiquated but extremely powerful Sith Meditation Sphere in the ruined temple, and took the attack to the pirates.

Places of Interest

New Adasta
New Adasta was the capital city of the planet Ziost, the original seat of the old Sith Empire, and a major commercial, political, and population center of the reconstituted Sith. A metropolitan city, New Adasta was constructed atop a rocky crag in the tundra of Ziost, and the city's Central District was in fact located in the cave underneath that crag. The centerpiece of the city was the People's Tower, a large skyscraper similar in design to the Imperial Citadel. During the Invasion of Ziost, the former Sith Emperor Vitiate focused a significant portion of his attention and power to New Adasta as he possessed the population of the planet.
New Adasta was constructed by the Sith sometime between the Great Hyperspace War and the Great Galactic War, during a period of Sith recolonization, when the empire reclaimed many of its holdings lost during the former conflict. Over the years, it grew into a major city, thus replacing the planet's former capital and becoming the primary Sith hub in the border regions of Imperial Space. While the new capital of the Sith Empire was now located on the jungle world of Dromund Kaas, the construction of the city restored much of the planet's former significance.
But, aside from being merely a strategic colony on the border, New Adasta was also one of the largest trade hubs in the Empire, merchants from all over flocking to the business districts throughout the town. To that end, it was revered as one of the most significant economic centers in the whole Empire, even earning the planet the nickname, "the Gateway to the Empire."
At some point, the headquarters of the Ministry of Logistics relocated to the metropolis, its minister setting up an office at the Orbital Defense Command Center, which functioned as the planetary capitol.
The city also contained the Empire's primary customs office and at least one hotel.
In 3640 BBY, SIS agent Theron Shan and Jedi Master Gnost-Dural visited the city during Operation End Game, where the former, with the help of his friend Teff'ith, succeeded in stealing a black cipher from Minister Davidge's safe in the heavily guarded Orbital Command Center. With the cipher, the Galactic Republic could easily conduct counter-espionage against Imperial Intelligence.

Orbital Defense Command Center
The Orbital Defense Command Center was a military base located on the Sith-controlled planet of Ziost during the Galactic War. At some point, following the world's capital city's construction, the command center was constructed, and went on to serve a number of purposes, including, but not limited to, local headquarters for Imperial Intelligence, planetary customs, and air traffic control of the system. It also served gubernatorial purposes. Eventually, the headquarters of the Ministry of Logistics would relocate to the building.
The Orbital Command Center was constructed following the Sith reconquest of their ancient capital world of Ziost at some point before or during the Great Galactic War. Although the empire's capital had relocated to Dromund Kaas, Ziost once more became an important planet in Sith buffer space. The Orbital Command Center became the primary government building on the planet, functioning as a military headquarters and a governor's residence.
During the Cold War, the Sith Ministry of Logistics relocated from Dromund Kaas to Ziost, and the minister set up an office in the Orbital Command Center, thus making it the main headquarters for the entire bureaucracy.
The building was believed to be virtually impenetrable, being heavily fortified. But that was not entirely the case, as in 3640 BBY, SIS operative Theron Shan infiltrated the Orbital Command Center to steal a black cipher from the minister's office during Operation End Game. Not even Imperial security could stop the young agent from breaking into what was thought to be the most secure facility on-world.

Ministry of Logistics
The Ministry of Logistics was a division of the Sith Empire, one that fell under the Sphere of Production and Logistics.
The ministry was controlled by the Minister of Logistics who technically answered to the Sphere of Production and Logistics though he would also at times report to other councilors, such as the one who oversaw the Sphere of Defense of the Empire if it referred to a military issue. Though seen by some as the lowest of the Ministries, it was also the most vital. The ministry provided calculations to fend off enemy troops, logistical necessities of fleets and ground forces, and financial concerns of a war. Industries are nationalized the Ministry manages the factories who produce the weapons for the Empire's war machine. Along with this are agricultural worlds that are used for the food supplies of the Imperial military. The Ministry also supervised the Empire's slave labor and makes adjustments where necessary to complete building projects and run various industries. Added to this, the ministry runs the Empire's civilian transportation and trade network ensuring the transit of goods in the Empire. It was also responsible for the public transit on the capital planet of Dromund Kaas. At the time of the Cold War, the public transports were only available to the citizens of the Empire, and the Ministry was tasked with delivering the proper passes. Its office was located in Hub 3 of Kaas City.
During the Cold War, they brought in Chiss agents on loan from the Chiss Expansionary Defense Force to aid their military campaigns against the Galactic Republic on Hoth. This aid consisted of cold weather training and equipment to better aid the Imperial military forces on the frozen world. The Minister of Logistic was Shullis Khamarr.
At this time, the Ministry reported to Imperial Intelligence that they were unable to prevent the broadcast being made by the terrorist known as the Eagle. As a result, everyone within the Sith Empire witnessed the message being projected by the dissident.
After a rakghoul plague outbreak on Tatooine, the Imperial News Network informed the citizens of the Empire of a travel ban with the Ministry advising when this would expire issuing the Imperial Edict 1968Z, authorizing all Imperial personnel with terminating anyone that was infected by the rakghouls or were carriers of the disease.
According to Lana Beniko, the Ministry of Logistics was the only department of the Imperial government functional enough to negotiate and implement the Empire's surrender to the Eternal Empire of Zakuul after the abrupt end of the Galactic War. By this point, most of the Dark Council were either dead or missing, and none of the remaining Darths or Ministries were willing to accept responsibility for the surrender. As it was the Ministry of Logistics was under his Sphere, Darth Vowrawn was forced to personally represent the Sith before the Eternal Throne.
Shortly thereafter, Darth Acina declared herself Empress of the Sith and assumed control of the imperial government. Under her regime, Gelmid Lorman served as Minister of Logistics. In 3630 BBY, Lorman greeted The Outlander, Lana Beniko and Theron Shan upon their arrival on Dromund Kaas. Lorman secretly conspired with Leontyne Saresh to assassinate the Outlander and Empress Acina, but the pair successfully thwarted the plot.

Sith Citadel
The Sith Citadel, known to the reconstituted Sith Empire as the Great Citadel, was a fortress built by the old Sith Empire on Ziost sometime before the Great Hyperspace War. It served as its capital city and the meeting place of the Sith Council.
The Sith Citadel was constructed long before the Great Hyperspace War by the Sith Empire after abandoning its former capital world of Korriban. It was initially intended to be the palace and focal point of the empire, establishing Ziost as the new seat of Sith power.
The Sith Citadel of Ajunta Pall, ancient capital city of the Sith Empire
Following Ajunta Pall's arrival on Korriban with his Dark Jedi and creation of a new Sith Kingdom, he would end up conquering Ziost, making the Citadel into his new capital. Under his rule, it grew into a massive city.
The capital was abandoned after the Sith defeat during the Great Hyperspace War after being forced to abandon Ziost, among other worlds such as Korriban. However, the empire was not defeated. In secret, a new empire was established on the new capital world of Dromund Kaas. The new metropolitan center, respectively named "Kaas City", thereby replaced the Sith Citadel as the primary city in the empire.
Around 3680 BBY, the Sith Empire returned to Republic space to initiate a bloody war and, at some point, managed to recolonize its former capital world. However, instead of reestablishing the citadel as the planetary capital, the Sith constructed the city of New Adasta to replace it, overshadowing the ancient castle.
Millennia later, Lumiya would visit it some time before the Second Galactic Civil War. Ben Skywalker visited this citadel with Kiara Olvidan while looking for the Amulet of Kalara.