This article is about the planetary system. For the medium tank that was renamed Styx in German products, see Stygian.
Styx 3151.svg
System Information
X:Y Coordinates25.844 : 25.543[e]
Spectral classF8IV[1]

System Description[edit]

Styx is located near the Athenry and Nirasaki systems.

Political Affiliation[edit]

Styx I[edit]

Styx I
System positionFirst[1]
Jump Point distance12 days[1]
Moons3 (Kronus, Nirvana, Void)[1]
Surface gravity0.83[1]
Atmospheric pressureStandard (Breathable)[1]
Equatorial temperature29°C[1]
Surface water79%[1]
Highest native lifeMammals[1]
Landmasses3 (Epimetheus, Gehenna, Perdition)[1]
History and Culture
Population2,078,000,000 (3130)[1][52]
Government and Infrastructure
Noble RulerViscount of Styx
Political LeaderPlanetary Governor
Military CommanderLegate Garret Trelesta (3130)[1][52]
CapitalSunder Falls[1]

Planetary History[edit]

The first colonists on Styx established their cities on the open plains of Epimetheus, the main continent, because this area received the weakest storms.[1] Styx was one of the worlds abandoned by the Terran Alliance following the Outer Reaches Rebellion and the Demarcation Declaration of 2242,[2] but Styx was incorporated into the Terran Hegemony within a century, becoming one of the worlds within the Lone Star Province.[4][8]

A few years after these first cities were established, geologists found extensive radioactive ores and other mineral resources that caused a few mining companies to arrive on-world; the output from these mines contributed significantly to the Terran Hegemony's economy, to the extent that the neighboring Draconis Combine wanted the world. This ongoing tension resulted in the first battle with BattleMechs.[1]

In 2443, the DCMS sent a company of tanks to Styx to raid the warehouses and refineries, hopefully capturing them intact for use by the Combine. The defenders, a lance of Terran Hegemony BattleMechs from the 801st Heavy Armored Regiment led Lieutenant Colonel Amanda Cunningham,[53] met the company of tanks with infantry support outside the city of Barbados. The muddy plains impeded the Kuritan armor, while the 'Mechs simply strode around with no problem; the net result was the complete destruction of the raiding Draconis unit, and the emergence of the BattleMech as the preeminent combat unit.[1][5]

After the fall of the Star League, the Draconis Combine took control of the world and kept it until the Word of Blake to the Jihad.

On 21 May 3027, the JumpShip Bifrost abducted the passenger DropShip Silver Eagle to an asteroid base in the Styx system, precipitating the Silver Eagle Incident. By this time, the Styx system was mined out after four centuries of intensive mining operations. It was owned by Viscount Robert Monahan, who sold his Styx mining enterprise to one Wayland Smith in late 3025. Smith duped investors into believing that the system was in fact not yet mined out, by allowing their spies to access false reports in his computer systems (which they believed they had hacked). He then escaped into the Lyran Commonwealth with some 25 million C-bills. The system had become a refuge for undesirables, which was tolerated by the Draconis Combine.[54]


Forces from the allied coalition assembled by Devlin Stone were attempting to liberate Styx in May 3077 as a part of Operation SCOUR when a Blakist ambush badly damaged the First New Ivaarsen Chasseurs. In response, on the 14th of May the commander of the Nineteenth Arcturan Guards authorized the bombardment of the base complex housing the Styx Protectorate Militia with tactical nuclear weapons. The resulting bombardment collapsed a number of mines in the area and destroyed the entire of the city in which the base complex lay. When challenged, the Lyran commander of the Nineteenth Arcturan Guards remarked "they're just Dracs, nobody important"—a comment which would become infamous in the annals of the liberation.[55] The words spoken by Leftenant General Lucas Hoffman attracted outrage in the local media, and most likely elsewhere. Casualties from the two tactical nukes detonated as airbursts over the capital city of Styx amounted to at least 15,000 civilians.[56]

Dark Age[edit]

In October 3135, forces from the DCMS and Dragon's Fury led by Katana Tormark joined forces to regain the planet for the Draconis Combine. Though at the beginning they had issues working together, after the deposition of Warlord Mitsura Sakamoto, they started coordinating better their forces. Their first shared action erupted just outside the spaceport city of Lindon's Folly, on the Gehenna continent. Attempting to breach the Republican defenses arrayed along the woodlands north of the city proper, the surprise dawn assault by a combination of DCMS and Dragon's Fury troops was finally beaten back after a three-hour battle. The Republican victory, however, came at tremendous cost.[57]

By the 15th of December,[58] RAF pushed a DCMS line back a good ten kilometers, with Charisse Perry leading the charge the whole way. But the fighting on the planet is back and forth. RAF forces get a ten-kilometer push on one side, DCMS respond by coming into the suburbs on the other. Neither side can get the upper hand for long. But this is one fight RAF won't run from.[59]

Military Deployment[edit]




Styx is a world of storms, flash floods, and mudslides, wild weather patterns caused by the gravitational pull of the planet's three moons. The planet has three continents, Epimetheus, Gehenna and Perdition.[1]

Planetary Locations[edit]

  • Barbados: a city[1]
  • Lake Wio: a city[1]
  • Lindon's Folly: a large spaceport city on the continent of Gehenna[1]
  • Memphis: a place on the Epimetheus continent[60]
  • Sunder Falls: planetary capital city, 120 km northwest of Memphis[1]

Companies and Industries[edit]

Map Gallery[edit]

Nearby Systems[edit]

Closest 76 systems (73 within 60 light-years)
Distance in light years, closest systems first:
Athenry 9.9 Nirasaki 10.6 New Britain 11.6 Saffel 13.7
Pike 14.8 Deneb Algedi 15.3 Dieron 17.3 Altair 20.7
Fomalhaut 20.8 Asta 21.7 Kervil 22.0 Chaville 23.0
Nashira 23.2 Telos 23.3 Quentin 24.1 Dyev 25.3
Lockdale 27.1 Caph 29.1 Imbros 29.2 Northwind 29.6
New Stevens 31.8 Killbourn 33.3 Yorii 34.1 Lambrecht 34.4
Errai 34.6 Al Na'ir 34.7 Helen 35.2 Sol 36.3
Rigil Kentarus 36.8 Pokhara 37.5 Lone Star 39.4 Bryant 40.8
Miyazaki 40.9 Kuzuu 41.2 Epsilon Indi 41.2 Small World 41.6
Keid 42.3 Rocky 42.5 New Home 42.5 Moore 43.5
Sirius 43.8 Tau Ceti 44.4 Towne 46.8 Biham 47.3
Epsilon Eridani 47.4 Ko 47.6 Procyon 47.9 Ascella 49.1
Murchison 49.2 Atria 49.3 Sheratan 49.4 Elix 49.6
Sabik 49.8 Ingress 50.2 Lyons 50.6 Ancha 50.7
Agador 51.1 Thorin 52.4 Addicks 52.6 Nai-Stohl 52.8
Fletcher 53.4 Muphrid 54.2 Deneb Kaitos 54.7 Zollikofen 55.2
Halstead Station 55.2 Sadachbia 55.7 Carver 55.8 Kaus Media 57.5
Ruchbah 57.7 Chara 58.3 Xi Ursae Majoris 58.6 Brownsville 58.6
Terra Firma 59.3 Ankaa 60.0 Shinonoi 61.1 Graham 61.1


  1. 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 1.14 1.15 1.16 1.17 1.18 1.19 1.20 1.21 1.22 1.23 Dark Age: Republic Worlds (3130), p. 44: "Styx World Profile"
  2. 2.0 2.1 Handbook: House Marik, p. 16
  3. Handbook: House Kurita, p. 18
  4. 4.0 4.1 Handbook: House Steiner, p. 13
  5. 5.0 5.1 Era Digest: Age of War, p. 5: "The New Knights"
  6. Handbook: House Steiner, p. 25
  7. Handbook: House Kurita, p. 31
  8. 8.0 8.1 Historical: Reunification War, p. 159
  9. Era Report: 2750, p. 37
  10. Field Manual: SLDF, p. xi: "Inner Sphere - [2764] Map"
  11. Historical: Liberation of Terra Volume 1, p. 11
  12. 12.0 12.1 Historical: Liberation of Terra Volume 1, p. 138
  13. First Succession War, pp. 24–25
  14. First Succession War, p. 27: "Draconis Combine Gains"
  15. First Succession War, p. 95: "Federated Suns Counteroffensives 2801–2818"
  16. Handbook: House Kurita, p. 43
  17. Handbook: House Steiner, p. 36
  18. Historical: Liberation of Terra Volume 2, pp. 122–123
  19. First Succession War, pp. 112–113
  20. Second Succession War, pp. 18–19: "Inner Sphere - 2830"
  21. Handbook: House Kurita, p. 53
  22. Handbook: House Steiner, p. 40
  23. House Kurita (The Draconis Combine), foldout: "Draconis Combine Map - [3025]"
  24. Handbook: House Kurita, p. 64
  25. House Steiner (The Lyran Commonwealth), foldout: Lyran Commonwealth Map - [3025]
  26. Handbook: House Steiner, p. 47
  27. Handbook: House Kurita, p. 66
  28. Handbook: House Steiner, p. 56
  29. Historical: War of 3039, p. 133
  30. Handbook: House Kurita, p. 68
  31. Handbook: House Steiner, p. 59
  32. Era Report: 3052, p. 11
  33. Era Report: 3052, p. 23
  34. Handbook: House Kurita, p. 71
  35. Handbook: House Steiner, p. 61
  36. Era Report: 3062, p. 11
  37. Era Report: 3062, p. 29
  38. Handbook: House Kurita, p. 74
  39. Handbook: House Steiner, p. 70
  40. Jihad: Final Reckoning, p. 42
  41. Jihad Secrets: The Blake Documents, p. 65
  42. Field Report: DCMS, p. 21
  43. Field Report: LAAF, p. 19
  44. Jihad: Final Reckoning, p. 63
  45. Field Manual: 3085, p. vii: "Inner Sphere - [3085] Map"
  46. Era Report: 3145, p. 11
  47. Dark Age: LinkNet Articles (3136), p. 23: "Letters From Home -- Week 03"
  48. Era Report: 3145, p. 39
  49. Field Manual: 3145, p. VI: "Inner Sphere - [3145] Map"
  50. Shrapnel, Issue #3: "Voices of the Sphere: Star League Day"
  51. Shattered Fortress, p. 103
  52. 52.0 52.1 Dark Age: Republic of the Sphere, p. 7: "Prefecture II"
  53. Experimental Technical Readout: Primitives, Volume 1, p. 8: "MSK-5S Mackie"
  54. Warrior: En Garde, chs. 42–45, 47, 49–50, 54, 56
  55. 55.0 55.1 Jihad: Final Reckoning, p. 57: "The Jihad In Review"
  56. Jihad Hot Spots: Terra, pp. 31–32: "Outrage"
  57. 3135 PDA Journals, p. 103: "11 October 3135"
  58. Dark Age: 3135 PDA Journals, p. 247: "19 December 3135"
  59. Dark Age: 3135 PDA Journals, p. 248: "23 December 3135"
  60. Heretic's Faith, ch. 24
  61. Handbook: House Kurita, p. 166: "Styx Mining"