Epsilon Eridani

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Note: X and Y are coordinates (light years on XY plane) relative to Terra at (0, 0)

Epsilon Eridani[edit]

Epsilon Eridani
Epsilon Eridani neighrbouring systems
Epsilon Eridani neighrbouring systems
System information
X:Y Coordinates 18.35 : -21.25[e]
Spectral class K2IV[1]
Planets 10[1]

The Epsilon Eridani system was home to at least one habitable world, Epsilon Eridani IV, and as at 3145 was located in the Republic of the Sphere.[2][3]

System Description[edit]

The Epsilon Eridani system is located near the Bryant and Epsilon Indi systems[2][3] and consists of a class K2IV primary orbited by ten planets.[1]

System History[edit]

Epsilon Eridani was settled during the early years of the Terran Alliance, with the first colony on Epsilon Eridani IV being establised by Alana Korvin DeVall at some point prior to 2208.[4]

Epsilon Eridani IV[edit]

Epsilon Eridani
Orbital view
Orbital view
System position 4[1]
Jump point
5 days[1]
Moons 1 (Minori)[1]
Surface gravity 1.06[1]
Atmospheric pressure Standard (Breathable)[1]
Equatorial temperature 34°C[1]
Surface water 83%[1]
Highest native life Mammals[1]
Reference Year 3130[1]
Ruler Lorelei Benton (Governor) (3130)[1]
Kaleed al-Dallarah (Planetary Legate) (3130)[1]
Capital Madison[1]
Population 2,453,000,000[1]

Epsilon Eridani IV - most commonly known simply as Epsilon Eridani - is the fourth planet in the system and has a single moon named Minori.[1]

Planetary History[edit]

Early History[edit]

The world known as Epsilon Eridani was first discovered in 2050 by the Terran Alliance probe Magellan Four.[5] The Terran Alliance explorer Alana Korvin DeVall helped found the Epsilon Eridani colony at some point prior to 2208,[4] and Epsilon Eridani was one of the worlds that remained a part of the Terran Alliance following the Outer Reaches Rebellion and the Demarcation Declaration of 2242,[6] later becoming one of the worlds within the Alliance Core region of the Terran Hegemony.[7]

Amaris Civil War[edit]

During the Star League era Epsilon Eridani became the site of the Army Headquarters for the SLDF Fifth Army,[8] the administrative headquarters of the first region of the Capellan Confederation and a series of training bases, many of them major.[9] With the eruption of the Periphery Uprising in 2766 the Fifth Army found itself responsible for the entire Capellan Confederation, and even though the Fifth Army received some reinforcements drawn from the First Army[8] this greater astrogeographical area of responsibility naturally led to the Fifth Army being stretched thin.[9]

When Stefan Amaris launched his coup on the 27th of December 2766 on Terra his forces also swung into action on all of the other worlds within the Terran Hegemony and a number of jointly-administered worlds.[10] This included Epsilon Eridani; despite the Fifth Army being deployed across the Confederation there were still a large number of personnel from the fifth Army on Epsilon Eridani, as well as a substantial number of SLDF personnel within the support and training organizations. These people, primarily administrative, support and logistics personnel, posed a risk to the Rim Worlds Republic forces, which had already managed to occupy at least one Castle Brian on Epsilon Eridani prior to the Coup beginning.[9]

The Republican forces hadn't been able to establish a foothold within any of the training facilities or the Military Region administrative headquarters, and as a result when they launched their campaign to take control of Epsilon Eridani they bombarded the Castle Brian housing the Military Region HQ with multiple nuclear weapons while also hitting the various training bases with a combination of nuclear and biological attacks. While these attacks were largely effective, the Republicans didn't manage to hit every training base, nor were they able to track down and hit every location where SLDF equipment was stored; they also failed to capture or destroy all of the war materiel stored across Epsilon Eridani awaiting shipping to the Periphery front. Epsilon Eridani subsequently became a hotbed for resistance against the Republican forces and Stefan Amaris as the SLDF personnel who survived the initial attacks made use of the remaining equipment to form and lead resistance groups across the planet.[9]

The AEAF orbital bombardment of Epsilon Eridani included strikes on the planetary capital, Madison, which was located on Parassus; the bombardment almost levelled the city, including the Star League mint which was located in the city and was repsonsible for printing Capellan currency.[1]

Succession Wars[edit]

First Succession War[edit]

With the outbreak of fighting after the fall of the Star League, Epsilon Eridani surrendered itself to House Liao's Ariana Grenadiers and Justinia's Cuirassiers. This was part of House Liao's first campaign during the First Succession War to claim former Terran Hegemony worlds between 2780 and 2800.[11]

Third Succession War[edit]

In 2944, House Liao's first Chesterton Voltigeurs repelled a House Marik raid on Epsilon eridani. The unit had fended off the attack by Marik forces with heavy losses in air and ground support.[12] In the last years of the Third Succession War, Laurel's Legion was able to make a blunt move to take the planet from House Davion forces in 3024.[13]

Fourth Succession War[edit]

Following negotiations between Colonel Pavel Ridzik, chief military advisor to Chancellor Maximillian Liao, and AFFS Lieutenant General Ardan Sortek, conducted in February 3029 Ridzik created a new nation, the Tikonov Free Republic. The Republic was created by incorporating those worlds of the Tikonov Commonality that hadn't already been conquered during the first half of the Fourth Succession War. Ridzik returned to Elgin, the new capital of the Tikonov Free Republic, on the 3rd of March 3029 and swiftly began implementing a new government consisting of family members, friends and other appointees loyal to himself, purging dissident elements on the various Republic worlds and taking the opportunity to settle old scores. Epsilon Eridani was one of the systems incorporated into the Republic.[14]

FedCom Civil War[edit]

In 3067 two mercenary units, the Lone Star Regiment and Redfield's Renegades, were battling on Epsilon Eridani when they made a significant discovery. The fighting near the Shamus Mountains unearthed an old Star League Defense Force depot hidden within the mountains. Still intact within the Depot was a functioning Colossus-class DropShip in pristine condition. Both mercenary units immediately laid claim to the DropShip, and with neither willing to compromise a gruelling combat was initiated that saw both units take heavy casualties. Ultimately, the Lone Star Regiment were the victors and recovered both the DropShip and the battlefield salvage as prizes.[15]

The Jihad[edit]

The Word of Blake assimilated Epsilon Eridani into their Protectorate early in the Jihad, and it would remain a Blakist world until February 3078. Forces from the Federated Suns front of Operation SCOUR liberated Epsilon Eridani on the 22nd of February after a fiercely fought week-long battle against the defending Blakist forces.[16] The assault on Epsilon Eridani was one of - if not the - first assault to be performed on the Federated Suns front since command of the front passed to Marshal Jon Davion following the death of Field Marshal Katheryn Sandoval-Ito on Acamar. Leading Group II of the Federated Suns front personally, Davion deployed the allied coalition forces via a combined arms sub-orbital drop strategy that he had developed during his time at Sakhara Academy. The drop allowed the coalition forces to strike directly at the Blakist leadership on Epsilon Eridani, decapitating the Word of Blake forces on the planet within the first 24 hours of combat operations and restoring civil law to the capital within a week.[17]

The Federated Suns News Service held up the smooth transition in leadership between Sandoval-Ito and Davion as an example of how closely the Marshal of the Armies had been involved in planning the Federated Suns front of SCOUR, and held up the quick campaign by Group III as an example of how the Group was a genuinely integrated force. The FSNS also included a human interest piece to substantiate the claim for easy integration, detailing an American Football match on Epsilon Eridani on or around the 22nd of February that saw a team consisting of members of Clan Nova Cat's Delta Galaxy augmented by personnel from the Drake's Drivers mercenary unit on one side and a LAAF offensive line on the other team, backed up by runners and receivers from the Benjamin Regulars and fielding a Com Guard quarterback.[17]

The Dark Age[edit]

The city of Madison, rebuilt after the Amaris Civil War, continued to serve as planetary capital during the rule of the Republic of the Sphere. Madison was located 370km northwest of Dori, the large port city located on the shores of Lake Arous which was itself the center of Epsilon Eridani's commercial industry.[1]

The largest of the various industries on Epsilon Eridani was Kressly Technologies - the renamed Kressly Warworks - who operated a number of manufacturing facilities across the planet, including an IndustrialMech manufacturing plant; Kressly expanded their presence on Epsilon Eridani when they established an aerospace plant in the Goushan Highlands on the site of a former surface testing facility. The facility had been a testing facility for the Harvard Company, a Star League-era aerospace fighter manufacturer which had been destroyed during fighting between the Capellan Confederation and the Federated Suns during the First Succession War, and the facility had largely been forgotten until Kressly redeveloped it.[1]

Political Affiliation[edit]

Planetary Rulers[edit]


  • Planetary Governor Lorelei Benton[1]
  • Planetary Legate Kaleed al-Dallarah[1]

Military Deployment[edit]






  • Lone Star Regiment[58]

3068 to 3070[edit]


- At this point in time, the V Protectors was at 60% of full strength, with 61% of their equipment featuring upgraded technology.



Epsilon Eridani is a pleasant but damp world, prone to frequent mild rainstorms. The two major continents are the southern continent of Gousha, which is divided primarily into a mix of swamplands and rainforest, and the northern continent of Parassus, which is rockier and drier than Gousha but still prone to frequent rain. Located on Parassus is a large lake named Lake Arous.[1]

Planetary Locations[edit]

  • Dori: a large port city and commercial hub on the shore of Lake Arous on Parassus.[1]
  • Madison: The planetary capital city, located on Parassus, and site of a Star League mint during the Star League era.[1]

Industrial Centers[edit]


Jihad Hot Spots: Terra states that during the Jihad, Epsilon Eridani was liberated by Group II of the Federated Suns front of Operation SCOUR. This has been noted to be an errata; Epsilon Eridani was actually liberated by Group III of the Federated Suns task force.

Epsilon Eridani was liberated by Group III of the Federated Suns thrust.

With regards,
Strategic Assistant

  — Øystein Tvedten, BattleTech Developer, 06 Aug 2012

Nearby Systems[edit]

Systems within 60 light-years (distance in light years)
Closest systems first:
Bryant 9.5 Epsilon Indi 12.3 Terra Firma 13.1 New Home 14.0
Brownsville 14.6 New Stevens 15.7 Keid 18.9 Caph 21.4
Sheratan 22.5 Capolla 22.7 Carver V (Liberty) 23.8 Northwind 24.2
Sirius 24.8 Outreach 25.3 Procyon 25.5 Fomalhaut 26.8
Acamar 27.4 Terra 28.1 Bex 28.5 Fletcher 28.5
Woodstock 30.1 Nanking 30.8 Ingress 31.4 Rigil Kentarus 31.9
Lockdale 32.4 Saffel 33.9 Chisholm (Elgin) 34.2 Hsien 35.4
Hechnar 35.5 Small World 36.3 Altair 36.3 Kawich 36.4
Dieron 36.7 Ruchbah 39.1 Arboris 39.1 New Earth (Tau Ceti) 39.2
Hall 39.7 Nopah 40.7 Killbourn 41.6 Zurich 41.9
Errai 42.2 Graham IV 43.3 Quentin 43.5 Nirasaki 43.6
Aldebaran 43.6 Genoa 43.7 Mandal 44.1 Bharat 45.4
Alula Australis 45.8 Azha 46.6 Deneb Kaitos 47.0 Styx 47.4
Basalt 48.4 Saiph 48.7 Tall Trees 48.8 Asta 48.9
Yorii 49.9 Liao(Cynthiana) 49.9 Helen 50.1 Pollux 50.2
Slocum 50.5 Wasat 50.8 Thorin 51.1 Hamal 51.6
Tyrfing 52.0 Oliver 52.1 Athenry 52.2 Deneb Algedi 52.5
Menkalinan 52.7 New Canton 52.7 Talitha 54.2 Zavijava 54.4
Devil's Rock 54.9 Pacifica (Chara) 55.0 Van Diemen IV 55.1 Hean 56.7
Addicks 56.9 Tigress 57.0 Inglesmond 57.3 Ankaa 57.6
Bhaktapur 57.6 Rocky 57.8 Ningpo 58.0 Pokhara 58.2
Muphrid 58.5 Towne 58.7 Castor 59.0 Imbros III 59.0
Lipton 59.1 Berenson 59.3 Denebola 59.5 Achernar 60.0


  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 1.24 1.25 1.26 1.27 Dark Age: Republic Worlds (3130), p. 238, "Epsilon Eridani"
  2. 2.0 2.1 2.2 Era Report: 3145, p. 38, "Inner Sphere - [3145] Map"
  3. 3.0 3.1 3.2 Field Manual: 3145, p. VI, "Inner Sphere - [3145] Map"
  4. 4.0 4.1 4.2 House Liao (The Capellan Confederation), p. 64, "The Korvin Doctrine"
  5. House Davion (The Federated Suns), p. 9, "Early TA unmanned probe discovers Eridani".
  6. 6.0 6.1 Handbook: House Marik, p. 16, "Free Worlds League Founding - [[2271] Map"
  7. 7.0 7.1 Historical: Reunification War, p. 159, "Inner Sphere - [2596] Map"
  8. 8.0 8.1 Historical: Liberation of Terra Volume 1, p. 43, "5th Army"
  9. 9.0 9.1 9.2 9.3 9.4 Historical: Liberation of Terra Volume 1, p. 84-85, "Atrocities And Excesses"
  10. Historical: Liberation of Terra Volume 1, p. 80, "Cometh Hell's Legions"
  11. House Liao (The Capellan Confederation), p. 45, "Eridani E surrenders to Liao forces in 1st Succession War".
  12. House Liao (The Capellan Confederation), p. 83, "1st Chesterton Voltigeurs" - Unit action during the Third Succession War on Epsilon Eridani.
  13. House Liao (The Capellan Confederation), p. 83, "Laurel's Legion" - Unit profile shows it fending off Davion attack in 3024.
  14. 14.0 14.1 NAIS The Fourth Succession War Military Atlas Volume 2, p. 16-17, "Tikonov Free Republic"
  15. Technical Readout: 3075, p. 198, "Colossus"
  16. 16.0 16.1 Jihad: Final Reckoning, p. 58, "The Jihad in Review"
  17. 17.0 17.1 Jihad Hot Spots: Terra, p. 71, "Epsilon Eridani Liberated"
  18. Handbook: House Kurita, p. 18, "Draconis Combine Founding - [2319] Map"
  19. Handbook: House Steiner, p. 13, "Lyran Commonwealth Founding - [2341] Map"
  20. Handbook: House Liao, p. 17, "Capellan Confederation Foundation - [2366] Map"
  21. Handbook: Major Periphery States, p. 18, "Rim Worlds Republic after Age of War - [2571] Map"
  22. Handbook: House Steiner, p. 25, "Lyran Commonwealth after Age of War - [2571] Map"
  23. Handbook: House Liao, p. 25, "Capellan Confederation after Age of War - [2571] Map"
  24. Era Report: 2750, p. 37, "Inner Sphere - [2750] Map"
  25. Field Manual: SLDF, p. vii, "Inner Sphere - [2764] Map"
  26. Historical: Liberation of Terra Volume 1, p. 11, "Inner Sphere - [2765] Map"
  27. 27.0 27.1 Historical: Liberation of Terra Volume 1, p. 138, "Operation LIBERATION Wave 1 [July 2772 - December 2774]"
  28. First Succession War (Source Book), pp. 24-25, "Inner Sphere - [2786] Map"
  29. Handbook: House Liao, p. 31, "Capellan Confederation after First Succession War - [2822 Map]"
  30. Historical: Liberation of Terra Volume 2, pp. 122-123, "Inner Sphere - [2822] Map"
  31. First Succession War (Source Book), pp. 112-113, "Inner Sphere - [2822] Map"
  32. Handbook: House Liao, p. 39, "Capellan Confederation after Second Succession War - [2864] Map"
  33. House Liao (The Capellan Confederation), p. vii, "Capellan Confederation Map - [3025]"
  34. Handbook: House Liao, p. 40, "Capellan Confederation after Third Succession War - [3025] Map"
  35. NAIS The Fourth Succession War Military Atlas Volume 2, p. 16, "Tikonov Commonality (Map)"
  36. Handbook: House Liao, p. 49, "Capellan Confederation after Fourth Succession War - [3030] Map"
  37. NAIS The Fourth Succession War Military Atlas Volume 2, p. 94, "End Of The War"
  38. Historical: War of 3039, p. 133, "Inner Sphere - [3040] Map"
  39. Era Report: 3052, p. 10, Inner Sphere - [3050] Map
  40. Era Report: 3052, p. 22, Inner Sphere - [3052] Map
  41. Era Report: 3062, p. 11, Inner Sphere - [3057] Map
  42. Handbook: House Liao, p. 60, "Capellan Confederation after Operation Guerrero - [3058] Map"
  43. Era Report: 3062, p. 29, "Inner Sphere - [3063] Map"
  44. Handbook: House Liao, p. 68, "Capellan Confederation after FedCom Civil War - [3067] Map"
  45. Jihad: Final Reckoning, p. 43, "Inner Sphere - [3067] Map"
  46. 46.0 46.1 Mercenaries Supplemental, p. 69, "Mercenary Employment Table"
  47. Jihad Secrets: The Blake Documents, p. 64, "Inner Sphere - [3075] Map"
  48. Field Report: Clans, p. 29, "Terran Corridor/Clans Deployment Map - [August 3079]"
  49. Jihad: Final Reckoning, p. 63, "Inner Sphere - [3081] Map"
  50. Field Manual: 3085, p. vii , "Inner Sphere - [3085] Map"
  51. Map of the Inner Sphere 3130
  52. Era Report: 3145, p. 11, "Inner Sphere - [3135] Map"
  53. House Liao (The Capellan Confederation), p. 105, "Unit Deployment Table"
  54. Historical: War of 3039, p. 138 "Deployment Table"
  55. Chaos March, p. 33
  56. 56.0 56.1 Mercenaries Supplemental , p. 66, "Mercenary Deployment Table"
  57. 57.0 57.1 Mercenaries Supplemental, p. 70, "Mercenary Employment Table"
  58. 58.0 58.1 Jihad Secrets: The Blake Documents, p. 110, "Word of Blake Mercenary Deployments"
  59. Field Manual: 3085, p. 187, "RAF Deployment Table - 3085"
  60. Field Manual: 3145, p. 144, "Republic Armed Forces - Principes Guards"