Lanth Subsector

Library Data Milieu 1116 Milieu 1200 

Lanth Subsector
Sector	Spinward Marches
Capital	Lanth (Spinward Marches 1719)
Number of Systems	27
Stellar and Economic data	data page
Majority Control	Third Imperium - 100%
Map Key	Map Key

Lanth Subsector is Subsector G of the Spinward Marches.

• It is part of the Imperial Domain of Deneb.

Physical Astrography

Lanth Subsector is a typical rift province, with the majority of its worlds situated in a trailing crescent around an underpopulated section of the spiral arm. Its major communications route crosses the rift and provides the only link with the Regina, Vilis, and Jewell Subsectors.

Astrographic Features

The following astrographic data has been determined regarding Lanth Subsector:

• The subsector is a slightly below average stellar density region.
• The brightest star is the red giant primary of the Keanou system.
• It contains the Abyss Rift, a region of lower stellar density.
• The Spinward Main runs along its coreward and trailing edges.

Stellar Distribution

A basic map showing the distribution and size of stars within Lanth Subsector.

• The color corresponds to the visible color of the star, which links to its spectral classification.
• The size as shown indicates both the physical size of the object and its relative brightness.

(Chart sourced from Traveller Map)

Note that the stars as depicted are representative. Any star, no matter what its size, is a mere speck within the hex it occupies.

• Ordinary main sequence stars can barely be seen from even a hex away.
• Huge, intensely luminous giant stars can be seen from across the subsector and far beyond.

Rifts

One rift region lies within the subsector:

• Abyss Rift

(Chart sourced from Traveller Map)

Trade Routes

The Spinward Main

The Spinward Main is the arterial trade route within the Spinward Marches.

High cargo capacity, low jump rating vessels laden with goods, commodities, and luxuries move along it, bound for the thriving markets of its member worlds.

(Chart sourced from Traveller Map)

• Worlds on the Spinward Main are marked in green.

Local Routes

The Spinward Main runs along the coreward and trailing edges of the subsector.

(Chart sourced from Traveller Map)

Politics and Diplomacy : Milieu 1116

The Lanth Subsector is defended by 18th Fleet. This fleet, and detachments from the sector fleet, are based within or on the edge of the rift at Ivendo (which serves as fleet headquarters), D'Ganzio, Lanth and Ghandi. The main task of the 18th Fleet is protection of commerce on the Spinward Main.

The rift area is known as the Abyss Rift and has a reputation for strange events occurring. The Rift means that most commercial traffic is required to use the Spinward Main, however, X-Boats and Imperial Navy patrols can quickly pass the subsector. Jump drive rated J3 or better is required to navigate through the rift.

The Unified Army of Lanth has only four divisions of lift infantry to call its own. In times of need Lunion and Rhylanor subsectors can provide additional troops.

Demographics

Significant populations of the following races (sophont species) reside within this subsector:

• Humaniti (Human races)
  • Solomani (Major Race)
  • Vilani (Major Race)

• Non-Human Races
  • None

• Terragens (Non-human Terran races)
  • Dolphins
  • Vargr (Major Race)

World Listing

Comprehensive Second Survey data for all worlds lying within Lanth Subsector is available.

• The primary source material for all data is Traveller Map.
• Other sources may differ: some elements of the data may be contradictory or incorrect.
• Data is occasionally updated as new information becomes available.

AAB library archives contain expanded data about the following systems:

27 Worlds in the Lanth Subsector in Era: Milieu 1116

Cogri  •   D'Ganzio  •   Dinom  •   Dinomn  •   Djinni  •   Echiste  •   Equus  •   Extolay  •   Ghandi  •   Icetina  •   Ivendo  •   K'Kirka  •   Keanou  •   La'Belle  •   Lanth  •   Pirema  •   Quopist  •   Rech  •   Rhise  •   Skull  •   Sonthert  •   Treece  •   Tureded  •   Victoria  •   Vreibefger  •   Wypoc  •   Ylaven

Note that some Second Survey data, though only 40 years old, may already be out of date.

• Scouting missions gathering reliable, verified data can receive substantial payment.

Subsector Timeline

Major events that have affected this subsector and the wider region that it lies within:

• circa -300,000: the Ancients are active within the sector, most notably transplanting humans from Terra onto Darrian.
• −5823: the Zhodani Consulate is established.
• -4045 to -2204: the Vilani Ziru Sirka controls vast territories.
• after -4045: a few Vilani dissidents fleeing the Ziru Sirka may have passed through the sector.
• -2404 to -2215: the Interstellar Wars. The young Terran Confederation battles against the ancient Ziru Sirka.
• -2400s: Terran explorers pass through the sector, heading generally to spinward and eventually founding settlements in the Theta Borealis region.
• -2204 to -1776: the Rule of Man administers the former Ziru Sirka.
• -1776 to 0: the Rule of Man collapses. Charted Space endures the Long Night.
• -1511: the Itzin Fleet, a group of far-flung Terran traders, contact the Daryens of Darrian. Over the next few centuries Daryen technology advances exponentially.
  • Colonists from the Fleet found settlements on a few other worlds within the region.
• -1270: Daryen exploration reaches 20 parsecs from Darrian itself.
• -1137: the Darrian Confederation is founded.
• -1118 to 380: the Aslan Border Wars.
• -924: the Maghiz – the primary star of the Darrian system destabilizes, creating a monumental Electromagnetic Pulse that hits worlds many parsecs away and destroys the now highly advanced Daryen civilization.
• circa -750: Gvegh Vargr from coreward launch sporadic raids into the sector.
• -399: Gram and a number of other worlds in the Sword Worlds Subsector are settled by Terrans fleeing a civil war in the Old Earth Union, in the Solomani Rim. They make their escape from Terra though Aslan Space.
• -200: contact between the Old Earth Union and the Terran settlements in the Sword Worlds Subsector is cut. The long and treacherous route through Aslan Space was made more difficult due to the ongoing Border Wars and the frequent political and territorial changes they caused.
• -187: the Zhodani establish contact with Daryens.
• -186: the Sacnoth Dominate, the first Sword Worlds' government forms.
• The Year 0: the Third Imperium is founded, ending the Long Night.
• 60: Imperial development within the Marches begins in earnest with the settlement of Mora. The Imperial frontier gradually expands into the sector.
• 73: Imperial traders exploring to spinward establish formal contact with the Sword Worlds.
• 75: Regina is settled. A bubble of Imperial territory grows around it.
• before 100: increasing numbers of Vargr settle the relatively empty regions to coreward.
• 148: the IISS make formal contact with Daryens.
• 300: Pretoria, in Deneb Sector, is settled by the Imperium and eventually becomes the administrative center for the Aramis Trace in the Spinward Marches.
• 300-420: the Imperial First Survey charts the subsector.
• 400s: the Zhodani begin settlement within the Marches. They know it as Tloql Sector.
• 589-604: First Frontier War.
• 604-622: the Imperial Civil War.
• 615-620: Second Frontier War.
• 624: the Express Boat Network is established.
• 800-820: the Psionics Suppressions.
• 979-986: Third Frontier War.
  • 986: Battle of Porozlo.
• 995-1065: the Imperial Second Survey charts the subsector.
• 1065: the Second Survey is published. Information about the subsector becomes widely available.
• 1082-1084: Fourth Frontier War, also known as the False War.
  • 1084: Battle of Two Suns.
• 1107-1110: Fifth Frontier War.

---

Subsector Summary

Lanth, subsector G of Spinward Marches, contains 27 worlds with an estimated combined population of 1 billion, a per capita income of Cr2,248, and a total economy of BCr2,332. These worlds originate an interstellar trade of BCr59 through 23 starports (1 Class A, 8 Class B, 8 Class C, 6 Class D) employing 13,965 people. Driving this interstellar trade are four Agricultural (Ag) worlds, two Non-Agricultural (Na) worlds, one Pre-Agricultural (Pa) world, two Pre-Industrial (Pi) worlds, one Rich (Ri) world, and no Industrial (In) worlds. The governments in Lanth maintain seven Naval bases and five Scout bases. The average technology level is 7 (with most between 4 and 10). The highest technology level is 13 at D'Ganzio (Spinward Marches 1920).

Lanth, subsector G of Spinward Marches, contains 37 stars and 274 identified planets; 17 monostellar systems, ten binary systems, no trinary systems, and no systems with four or more stars. 22 of the 27 systems (81%) have native gas giants. There are no Asteroid (As) belts, one Desert (De) world, no Garden (Ga) worlds, one Ice-capped (Ic) world, four Poor (Po) worlds, two Vacuum (Va) worlds, and three Water (Wa) or Ocean (Oc) worlds.

Lanth has an estimated population of 1 billion distributed across no High population (Hi) worlds, three Moderate population (Ph) worlds, 15 Non-industrial (Ni) worlds, five Low population (Lo) worlds, and one Barren (Ba) world. The highest population worlds are Treece (Spinward Marches 2311), Equus (Spinward Marches 2417), and Extolay (Spinward Marches 1711). The population consists primarily of 3 sophont groups.

3 identified sophont populations in Lanth
Humaniti of Terra (Solomani Rim 1827): 997 million on 26 worlds. Vargr of Lair (Provence 2402): 20 million on one world. Dolphin of Terra (Solomani Rim 1827): 20 million on one world.

Third Imperium, Domain of Deneb

The Third Imperium, Domain of Deneb has jurisdiction over all of the worlds with an estimated combined population of 1 billion, a per capita income of Cr2,248, and a total economy of BCr2,332. These worlds originate an interstellar trade of BCr59 through 23 starports (1 Class A, 8 Class B, 8 Class C, 6 Class D) employing 13,965 people. Driving this interstellar trade are four Agricultural (Ag) worlds, two Non-Agricultural (Na) worlds, one Pre-Agricultural (Pa) world, two Pre-Industrial (Pi) worlds, one Rich (Ri) world, and no Industrial (In) worlds. The governments in the Third Imperium, Domain of Deneb maintain seven Naval bases and five Scout bases within the subsector. The average technology level is 7 (with most between 4 and 10). The highest technology level is 13 at D'Ganzio (Spinward Marches 1920).

The Third Imperium, Domain of Deneb has an estimated population of 1 billion within the subsector, distributed across no High population (Hi) worlds, three Moderate population (Ph) worlds, 15 Non-industrial (Ni) worlds, five Low population (Lo) worlds, and one Barren (Ba) world. The highest population worlds are Treece (Spinward Marches 2311), Equus (Spinward Marches 2417), and Extolay (Spinward Marches 1711). The population consists primarily of 3 sophont groups.

• The Third Imperium, Domain of Deneb subsector capital of Lanth is Lanth (Spinward Marches 1719).

References

This list of sources was used by the Traveller Wiki Editorial Team and individual contributors to compose this article. Copyrighted material is used under license from Mongoose Publishing or by permission of the author. The page history lists all of the contributions.

• Marc Miller. The Spinward Marches (Game Designers Workshop, 1979), 22-23.
• Marc Miller. The Spinward Marches Campaign (Game Designers Workshop, 1985), 18-19.
• Marc Miller. Imperial Encyclopedia (Game Designers Workshop, 1987), 94-100. (UWP only)
• Rob Caswell. "Domain of Deneb: Sector Data." MegaTraveller Journal 3 (1992): 47-58. (UWP only)
• Dave Nilsen. The Regency Sourcebook (Game Designers Workshop, 1995), 42. (UWP only)
• Martin Dougherty, Neil Frier. Behind the Claw (Steve Jackson Games, 1998), 84-90.
• Mike West. The Spinward States (Avenger Enterprises, 2008), 104. (UWP only)
• Martin Dougherty. The Spinward Marches (Mongoose Publishing, 2008), .
• Martin Dougherty. Behind the Claw (Mongoose Publishing, 2019), 67-72. (UWP only)
• Martin Dougherty. Whispers on the Abyss (Mongoose Publishing, 2024), 26.