Ylaven (world)

Ylaven/Lanth (Spinward Marches 1916)
Classic Era (1116)	X587552-4 Starport X No Starport Size 5 Medium (8,000 km, 0.40g - 0.57g) Atmosphere 8 Dense Hydrographics 7 Wet World 70% Population 5 Moderate (900 thousand) Government 5 Feudal Technocracy Law 2 Low Law (no energy weapons) Tech Level 4 Industrial (combustion)
See also	UWP
System Details
Primary	F9 V
Planetoid Belts	2
Gas Giants	2

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Jump map from Travellermap.com

Ylaven is an agricultural, nonindustrial, pre-rich world with a growing agro-economy, but still lacks an adequate population to expand its economy to a rich status.

• As an agricultural world, this world is a near-ideal environment for producing quality foodstuffs of plant, animal, and other forms. Quality foodstuffs are a major export commodity for this world.
• It requires extensive imports of outside technology to maintain a modern, star-faring society. Having to import most manufactured and high tech goods drives the price up for these items at this world.
• This world has promising economic future although it needs to recruit a larger labor force in order to achieve the desired prosperity.
• It is a member of the Third Imperium in the Lanth Subsector of Spinward Marches Sector in the Domain of Deneb.
• This is a "low technology" world with technology competencies well below technology standards for Charted Space.
• This is a "forbidden" world designated as a Red Zone with an environment, laws, customs, life forms, or other conditions that make it extremely dangerous to visitors. Everyone is forbidden to travel here.
• It lies within the Abyss Rift.

Description (Astrography & Planetology)

Stars

Ylaven has a solitary primary star.

• It is a white main sequence.

Ylaven has a solitary primary star.

Ylaven
	Type	Category		Mass (Sol)	Temperature (K)	Luminosity
	F9 V	Main Sequence		1.13	5990 - 6050	1.53382
	Unit	Diameter	Safe Distance	Habitable Zone	Jump Shadow	M-Drive Limit
	AU	0.0109	0.1027	1.16 - 2.03	1.09	10.9
	Orbit #	*	0	4	3	7
	Remarks		None

System Data

The worlds of the system have been surveyed. They consist of:

• The mainworld.
• x6 secondary rocky worlds.
• x2 planetoid belts.
• x2 gas giants.

Mainworld Data

Mainworld Size (S)

Ylaven is a Meso World between 7,200km and 8,800km in diameter. The world has a standard gravity between 0.4G and 0.57G. The horizon will appear about 4km away.

Mainworld Atmosphere (A)

Ylaven has a pressure of 1.50 to 2.49 atmospheres. A Dense Atmosphere requires no survival gear although it may be hard on sophonts not accustomed to it.

Mainworld Hydrosphere (H)

Ylaven has 65-75% of its surface covered by liquid water. It has significant large liquid bodies. Wilderness refueling is possible.

Mainworld Geography and Topography

No centrally held map of the world exists within AAB Library Data records.

(Blank map, predominantly watery world.)

History & Background (Dossier)

Ylaven is a Forbidden World and is designated as a Red Zone. It presents serious risks and dangers due to the environment or native life forms, laws or customs, or other conditions that make it extremely dangerous to visitors.

• Travel to this world is prohibited.

Ylaven is interdicted to protect the development of the indigenous human population, who appear to be the descendants of a sublight colony mission from Terra. They are clustered in a large settlement on the coast of a shallow inland sea. Hunters and trappers wander inland for months on end, returning to civilization when they have accumulated a suitable amount of furs to sell. Other industry includes a little ore mining and primitive greenhouse agriculture.

World Starport (St)

Ylaven does not have a starport. The Class X Starport is an indication that no starport exists in the system. There are no facilities or services available, and no site marked for landing.

World Population (P)

Ylaven has a population of 900,000 sophonts (hundreds of thousands).

• This is a Nonindustrial World, too small to support the complete chain of production of most goods from start to finish.

Linguistic Topography

The most commonly heard languages are:

• Anglic, one of the two official languages of the Imperium.
• Vilani, one of the two official languages of the Imperium.

World Technology Level (T)

Ylaven possesses a Technology Level of TL–4.

• Common Communication technologies for this TL include: Telephone and telegraphs, widespread printing.
• Common Power Generation technologies for this TL include: Early electricity, hydrocarbon internal combustion.
• Common Transportation technologies for this TL include:
  • Land: Trains and early automobiles.
  • Water: Clippers and steam ships.
  • Air: Dirigibles, balloons, very basic rockets.

World Government (G)

Ylaven is governed by a Feudal Technocracy. Society divides itself based on the technical requirements of the society. Each of these functions are granted as a fief to an individual or group. Leadership of these fiefs determines the head of the government.

World Law (L)

Ylaven has a low law level. There are few laws, covering only important areas. There may be few or no law enforcement officers, the expectation is citizens will bring law breakers to the attention of the Judicial system. Legal proceedings will be fast, with few people involved. For interactions outside of the framework of the laws, cultural norms dominate. Portable energy weapons, body pistols, explosives, and poison gas are typically regulated or prohibited.

Trade Data

• Importance: -2 (very unimportant)

World Economy

• Resources: 7 (descriptor)
• Labor: 4 (tens of thousands)
• Infrastructure: 2 (extremely limited)
• Efficiency: -5 (extremely poor)

World Culture

• Heterogenity: 1 (monolithic)
• Acceptance: 3 (xenophobic)
• Strangeness: 1 (very typical)
• Symbols: 1 (extremely concrete)

Historical Data

Ylaven was colonized by an old Solomani STL mission sometime in the Long Night. When first discovered by IISS, the population had regressed to pre-industrial levels, and the world was interdicted. Despite slow scientific progress, the locals managed to finally reach TL–5 in 1150, and RISS successfully contacted them in 1154. Despite severe cultural gaps with their neighbors, the Ylavenites have slowly adjusted, in large part aided by their remote location. The world's economy is dominated by farms that provide food products for naval bases on nearby Ghandi and D'Ganzio. The new government code reflects a change made in 1186, in the wake of growing demands on local infrastructure made by the population.

Original Settlement:

The first colonists arrived on Ylaven, or as they call it Dakota, around -500. They were in suspended animation since they left Terra almost 2000 years before. When their ship arrived at Ylaven they landed and cannibalized its hull to build shelters and burrow an underground shelter against the cold. Over the course of 30 years they performed extensive projects seeding the world with many of the life forms they had brought with them from Terra.

Their largest project was planting millions of trees to help raise and maintain oxygen levels in the atmosphere. This has been their largest and most successful efforts, almost the entire continent is completely covered by a sea of evergreens. Along with this they planted a collection of shrubs and other ground hugging plants to provide shelter for the smaller wildlife they were going to release.

By the end of their 30 years preparation they began releasing the higher life forms into the forests, Deer first to establish a population base and spread across the continent. This was followed by the more predatory species like Bears and eventually Lions.

Another of their projects was to seed the Baltic Sea with life, including salmon and trout, which forms a major part of their diet.

Disaster:

About 50 years after making planet fall, there was an accident in the power plant of their cave shelter. The fusion reactor which had provided all their power exploded killing fully two thirds of the population including many scientists.

The survivors fled the radiation flooded caves and eventually settled on the coast of the Baltic Sea. They survived on the fish of the sea and deer that gathered in the area.

Over the next generation, much of the technology that had been salvaged, including small power sources, computers, weapons and vehicles, either broke down or was lost. The TL had dropped to about TL–2, although Environmental TL dropped further to TL–1.

Rebirth of Science:

Ylaven wallowed at this level for nearly 800 years (300IC), until a figure arose and began teaching the science of the ancestors. Many rejected his teachings as heretical and likely to bring disaster down on them. These Luddites grew violent against the students who fought to protect their new master.

The new scientists used several advanced weapons to quell their opponents, whenever they came into conflict. Riots raged in Chicago on and off for many years until the Luddite leaders suddenly conceded defeat and declared the scientists their masters. This was met with much concern by the populace but they had lost the will to fight after nearly a decade of fighting. The instigators had turned to the other side. The scientists had won.

Growth:

Under the scientists the population grew a hundred fold, no longer held in check by poor sewage and disease. Farming of the fish stocks in the Baltic also helped sustain the population, and raised the overall standard of living. They developed improved construction materials and better road surfaces.

Imperial Navy actions in the system included destroying the base of the notorious pirate Mous Alhabah who disappeared with his treasure in 429.

The Telegraph was developed around 50 years ago, and is slowly being supplanted by the voice telephone. Today around 1 in 10 households have a telephone.

During the Fifth Frontier War:

The Ylaven system was captured by the Zhodani during 1109. It was during this period of occupation that a long term base was established in the outer planetoid belt. It has remained undetected through to 1120. The IISS's interdiction has focused on the Ylaven mainworld and the gas giants that would be used for wilderness refuelling.

Steam engines were developed within the last ten years and a simple rail system that runs from one end of the city to the other has almost been completed.

Natural Disaster:

Around 20 years ago there was a totally unprecedented earthquake that leveled most of the poorer areas of Chicago. Hundreds lost their lives in the debris. Several ore mines collapsed killing dozens more. The areas of Chicago with the newest buildings are those areas that were damaged in the quake. The scientists have worked to develop a completely new and more quake resistant construction material that all new buildings are being made from. The mines have been re-dug, and shored up with more secure methods and refuges have been built into areas of the mines where trapped miners can take shelter in case of a collapse and use the telephones located there to call for help.

In the immediate aftermath of the quake there was an outbreak of severe cold like symptoms. Nearly a hundred people were killed before it was brought under control. There have been no reports of the disease before or since.

World Timeline

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

• The Year 0: the Third Imperium is founded.
• 300-420: the Imperial First Survey charts the system.
• 589-604: First Frontier War.
• 604-622: the Civil War.
• 615-620: Second Frontier War.
• 624: the Express Boat Network is established.
• 979-986: Third Frontier War.
• 995-1065: the Imperial Second Survey charts the system.
• 1065: the Second Survey is published. Information about the system becomes widely available.
• 1082-1084: Fourth Frontier War, also known as the False War.
• 1107-1110: Fifth Frontier War.

---

IISS GURPS Astrographics Survey

1916 Ylaven (Imperial) - Red Zone

Starport: Class 0.

Diameter: 5,106 miles (8,200 km).
Atmosphere: Dense oxygen-nitrogen.
Hydrographics: 68%.
Climate: Very Cold.
Population: 532,000.
Government: Technocracy.
Control Level: 1.
Tech Level: 5.
World Trade Number: 0.

References & Contributors (Sources)

This article is missing content for one or more detailed sections. Additional details are required to complete the article. You can help the Traveller Wiki by expanding it.

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)
• Loren Wiseman. "Lost Treasure ships of the Abyss Rift." Challenge 44 (1990): 32.
• 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), 86.
• Hans Rancke-Madsen. "Worlds Within Jump-6 of Regina", JTAS Online (July 18, 2006)
• 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)
• Paul Campbell - TML Landgrab