Epsilon Eridani

Epsilon Eridani
← 3135
Epsilon Eridani nearby systems
Epsilon Eridani nearby systems
(Map Legend)
System Information
X:Y Coordinates 18.35 : -21.248[e]
Spectral class K2IV[1][2]
Recharge time 193 hours[2]
Recharge station(s) Nadir & Zenith[2]
Planets 10[1]


The Epsilon Eridani consists of a class K2IV primary orbited by ten planets.[1][2] and home to at least one habitable world, Epsilon Eridani IV, which as of 3145 was located in the Republic of the Sphere.[3][4]

System History[edit]

Epsilon Eridani was settled during the early years of the Terran Alliance, with the first colony on Epsilon Eridani IV being established by Alana Korvin DeVall at some point prior to 2208.[5]

Ownership History[edit]

Epsilon Eridani IV[edit]

Epsilon Eridani IV
Orbital view
Orbital view
System position 4[1][2]
Jump point
4.85 days [2]
Moons 2 (Minori, Almagest)[35][2][47]
Surface gravity 1.06[1][2]
Atmospheric pressure Standard (Breathable)[1][2]
Equatorial temperature 34°C[1][2]
Surface water 83%[1][2]
Highest native life Mammals[1][2]
Founding 2208 [5]
Reference Year 3141[2]
Ruler Duke Pierre Benton (3062 - 3067)[48]
Kaleed al-Dallarah, Governor (3130)[49]
Lorelei Benton, Legate (3130)[49]
Theo McCellan, Governor (3141)[2]
Rowan Roberts, Legate (3141)[2]
Capital Madison[1][2]
Population 2,453,000,000 (3130)[49][1][2]
Socio-Industrial Levels A-A-D-C-B (3141)[2]
HPG (Representative) B [2]

Planet History[edit]

Early History[edit]

The world known as Epsilon Eridani was first discovered in 2050 by the Terran Alliance probe Magellan Four.[50] The Terran Alliance explorer Alana Korvin DeVall helped found the Epsilon Eridani colony at some point prior to 2208[5], 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.[13]

Circa the mid-22nd century, one of the Slowboat Colonization ships that had left Terra prior to the FTL first ships' creation arrived at Epsilon Eridani to find a burgeoning colony already established by Terran Alliance Jumpships. The Alliance, who had a long memory for dissidents, turned those missions into laughingstocks and not the historical achievements they were.[51] It is not known what happened to those colonists.[citation needed]

Amaris Civil War[edit]

During the Star League era Epsilon Eridani became the site of the Army Headquarters for the SLDF Fifth Army,[52] the administrative headquarters of the first region of the Capellan Confederation and a series of training bases, many of them major.[17] 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[52] this greater astrographical area of responsibility naturally led to the Fifth Army being stretched thin.[17]

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.[53] 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.[17] The SLS Antietam Creek was a black navy ship from the SLDF attached to the 2nd Battalion of the 83rd BattleMech Division when the unit tried to escape from Epsilon Eridani during the Amaris Coup in 2767.[54]

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 matériel 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.[17]

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 responsible for printing Capellan currency.[1]

After the capital Madison was bombarded by the Rim Worlds forces, many residents of the city found shelter inside the Harvard Company, Inc.'s aerospace components factory. Once Amaris landed those survivors were subjected to a brutal massacre and the factory was razed to the ground.[55]

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.[56]

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.[57] 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.[58]

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.[26]

Civil War Era[edit]

In 3062, the mercenary units Kingston's Killers and The 48th were hired to take part in a small conflict on the side of Palatine of Duvic faction against the County Shu faction. This conflict would find the Kingston's Killers to be all but destroyed and the Palatine of Duvic faction found guilty of conspiring with the Word of Blake against the planetary government.[35] The 48th were reported to be cleared of all wrongdoings by the local authorities when evidence of their employers’ corruption came to light.[59]

Major Kingston Crawford, for whom the unit was named, died at the hands of a reinforced light lance of the Shu County Volunteer Battalion BattleMechs, called the Vigilantes (formerly Veck's Vigilantes, after the previous unit commander), commanded by Commander Tybalt Kelly. Kelly's lance consisted of his Lineholder, a Raven, a Javelin, and a pair of Commandos. Both the Javelin and one Commando were lost in the fight with Crawford's Pillager. Major Namihito, commander of the 48th, was involved in uncovering the collusion between the Duvic Palatine and the Word of Blake.[35]

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 grueling 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.[60]

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 Epsilon Eridani Protectorate Militia forces.[41] 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 suborbital 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.[61]

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 an LAAF offensive line on the other team, backed up by runners and receivers from the Benjamin Regulars and fielding a Com Guard quarterback.[61]

Republic Era[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 370 km 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] It was here that Malcolm Buhl's faction of ComStar built its primary base of operations in the planet's second newly recovered SLDF depot. In February of 3141 after the reborn 1st Division had made itself known and were chased from their Omega base on Luyten 68-28. It was here that the new Com Guards would attempt a fighting stand against the RAF. After 10 days of brutal fighting, the Republic forces of Stone's Revenants and the XIV Hastati Sentinels had effectively destroyed the Blessed Order.[62][63]

Military Deployments[edit]




  • Epsilon Eridani Sarna March Militia [66]




  • Lone Star Regiment[70]

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][73]

Planetary Locations[edit]

  • The County Shu region from the planet ruled by House Shu See Also: Claudia Hall.[35]
  • Dori: a large port city and commercial hub on the shore of Lake Arous on Parassus and is the center of the planet’s commercial industry, including Kressly Technologies.[1][73][74]
  • Madison: The planetary capital city, located on Parassus, and site of a Star League mint during the Star League era.[1][55] The city had to be rebuilt after the Amaris occupation, when it was virtually leveled by an orbital bombardment.[73]
  • New Copley: Due to private investment in the 3120s, the city became the focal point for the new mining operations on the dozen reopened abandoned mines in the area. In addition the city boasts the Benton SmeltWerks which is the largest ore refinery on the planet. Secretly however, the city was built to cover Malcolm Buhl's faction's secret activities.[73]
  • Prosperity Station: the only town within 1500 km of the Shamus Mountains.[75]
  • Shamus Mountains: location of the battle between the Lone Star Battalion and Redfield's Renegades for the unearthed of an old Star League Defense Force depot hidden within the mountains.[75]
  • Epsilon: A city.[75]

Industrial Centers[edit]



Map Gallery[edit]

Nearby Systems[edit]

Closest 92 systems (92 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 23.8 Northwind 24.2
Sirius 24.8 Outreach 25.3 Procyon 25.5 Fomalhaut 26.8
Acamar 27.4 Sol 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 34.1 Hsien 35.4
Hechnar 35.5 Small World 36.2 Altair 36.3 Kawich 36.4
Dieron 36.7 Ruchbah 39.1 Arboris 39.1 Tau Ceti 39.2
Hall 39.7 Nopah 40.7 Killbourn 41.6 Zurich 41.9
Errai 42.2 Graham 43.3 Quentin 43.5 Nirasaki 43.6
Aldebaran 43.6 Genoa 43.7 Mandal 44.1 Bharat 45.4
Xi Ursae Majoris 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 Cynthiana 49.9 Helen 50.1 Pollux 50.2
Slocum 50.5 Wasat 50.8 Thorin 51.1 Hamal 51.6
Tabit 52.0 Oliver 52.1 Athenry 52.2 Deneb Algedi 52.5
New Canton 52.7 Menkalinan 52.7 Talitha 54.2 Zavijava 54.4
Devil's Rock 54.9 Chara 55.0 Van Diemen 55.1 Hean 56.7
Addicks 56.9 Tigress 57.0 New Britain 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 59.0
Lipton 59.1 Berenson 59.3 Denebola 59.5 Alpha Eridani 60.0


  • 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 error; 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
  • Epsilon Eridani IV's number of moons was not been consistent, as older publications only mention the planet only having 1 Moon (such as Dark Age: Republic Worlds (3130)). However in Robert N. Charrette novel, Initiation to War, references are made using "moons" (plural). This "2 moon subject" then shows up again in Turning Points: Epsilon Eridani, and goes on to present an orbital view of the planet with 2 moons on the following page. It was then confirmed to have 2 moons by BattleTech's Assistant Line Developer, Ray Arrastia.
It has a wide elitical orbit. Two moons is correct. The older publication is incorrect (and has been known to contradict other sources).
  — Ray Arrastia, Assistant Line Developer, 15 Mar 2018


  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 Dark Age: Republic Worlds (3130), p. 238, "Epsilon Eridani"
  2. 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 2.15 2.16 2.17 2.18 Turning Points: Epsilon Eridani, p. 3-4, "Atlas"
  3. 3.0 3.1 Era Report: 3145, p. 38, "Inner Sphere - [3145] Map"
  4. 4.0 4.1 Field Manual: 3145, p. VI, "Inner Sphere - [3145] Map"
  5. 5.0 5.1 5.2 5.3 House Liao (The Capellan Confederation), p. 64, "The Korvin Doctrine"
  6. 6.0 6.1 Handbook: House Marik, p. 16, "Free Worlds League Founding - [[2271] Map"
  7. Handbook: House Kurita, p. 18, "Draconis Combine Founding - [2319] Map"
  8. Handbook: House Steiner, p. 13, "Lyran Commonwealth Founding - [2341] Map"
  9. Handbook: House Liao, p. 17, "Capellan Confederation Foundation - [2366] Map"
  10. Handbook: Major Periphery States, p. 18, "Rim Worlds Republic after Age of War - [2571] Map"
  11. Handbook: House Steiner, p. 25, "Lyran Commonwealth after Age of War - [2571] Map"
  12. Handbook: House Liao, p. 25, "Capellan Confederation after Age of War - [2571] Map"
  13. 13.0 13.1 Historical: Reunification War, p. 159, "Inner Sphere - [2596] Map"
  14. Era Report: 2750, p. 37, "Inner Sphere - [2750] Map"
  15. Field Manual: SLDF, p. vii, "Inner Sphere - [2764] Map"
  16. Historical: Liberation of Terra Volume 1, p. 11, "Inner Sphere - [2765] Map"
  17. 17.0 17.1 17.2 17.3 17.4 Historical: Liberation of Terra Volume 1, p. 84-85, "Atrocities And Excesses"
  18. 18.0 18.1 Historical: Liberation of Terra Volume 1, p. 138, "Operation LIBERATION Wave 1 [July 2772 - December 2774]"
  19. First Succession War (Sourcebook), pp. 24-25, "Inner Sphere - [2786] Map"
  20. Handbook: House Liao, p. 31, "Capellan Confederation after First Succession War - [2822 Map]"
  21. Historical: Liberation of Terra Volume 2, pp. 122-123, "Inner Sphere - [2822] Map"
  22. First Succession War (Sourcebook), pp. 112-113, "Inner Sphere - [2822] Map"
  23. Handbook: House Liao, p. 39, "Capellan Confederation after Second Succession War - [2864] Map"
  24. House Liao (The Capellan Confederation), p. vii, "Capellan Confederation Map - [3025]"
  25. Handbook: House Liao, p. 40, "Capellan Confederation after Third Succession War - [3025] Map"
  26. 26.0 26.1 NAIS The Fourth Succession War Military Atlas Volume 2, p. 16-17, "Tikonov Free Republic"
  27. NAIS The Fourth Succession War Military Atlas Volume 2, p. 16, "Tikonov Commonality (Map)"
  28. Handbook: House Liao, p. 49, "Capellan Confederation after Fourth Succession War - [3030] Map"
  29. NAIS The Fourth Succession War Military Atlas Volume 2, p. 94, "End Of The War"
  30. Historical: War of 3039, p. 133, "Inner Sphere - [3040] Map"
  31. Era Report: 3052, p. 10, Inner Sphere - [3050] Map
  32. Era Report: 3052, p. 22, Inner Sphere - [3052] Map
  33. Era Report: 3062, p. 11, Inner Sphere - [3057] Map
  34. Handbook: House Liao, p. 60, "Capellan Confederation after Operation Guerrero - [3058] Map"
  35. 35.0 35.1 35.2 35.3 35.4 Initiation to War
  36. Era Report: 3062, p. 29, "Inner Sphere - [3063] Map"
  37. Handbook: House Liao, p. 68, "Capellan Confederation after FedCom Civil War - [3067] Map"
  38. Jihad: Final Reckoning, p. 43, "Inner Sphere - [3067] Map"
  39. 39.0 39.1 Mercenaries Supplemental, p. 69, "Mercenary Employment Table"
  40. Jihad Secrets: The Blake Documents, p. 64, "Inner Sphere - [3075] Map"
  41. 41.0 41.1 Jihad: Final Reckoning, p. 58, "The Jihad in Review"
  42. Field Report: Clans, p. 29, "Terran Corridor/Clans Deployment Map - [August 3079]"
  43. Jihad: Final Reckoning, p. 63, "Inner Sphere - [3081] Map"
  44. Field Manual: 3085, p. vii , "Inner Sphere - [3085] Map"
  45. Era Report: 3145, p. 11, "Inner Sphere - [3135] Map"
  46. Shattered Fortress, p. 103, "Inner Sphere - [3151] Map"
  47. BattleTech Official Forums - Topic: The Moons of Epsilon Eridani, Adrian Gideon's reply
  48. Inner Sphere (sourcebook), p. 110
  49. 49.0 49.1 49.2 Dark Age: Republic of the Sphere, p. 22 "Prefecture IX"
  50. House Davion (The Federated Suns), p. 9, "Early TA unmanned probe discovers Eridani".
  51. Jihad Conspiracies: Interstellar Players 2, p. 66 "Terrelibre"
  52. 52.0 52.1 Historical: Liberation of Terra Volume 1, p. 43, "5th Army"
  53. Historical: Liberation of Terra Volume 1, p. 80, "Cometh Hell's Legions"
  54. Lawyers, Guns, & Money
  55. 55.0 55.1 55.2 BattleCorps: INN Newscast (ScandalVids section), news item published [19/04/3080]: "Epsilon Eridani's Star League Ghosts!"
  56. House Liao (The Capellan Confederation), p. 45, "Eridani E surrenders to Liao forces in 1st Succession War".
  57. House Liao (The Capellan Confederation), p. 83, "1st Chesterton Voltigeurs" - Unit action during the Third Succession War on Epsilon Eridani.
  58. House Liao (The Capellan Confederation), p. 83, "Laurel's Legion" - Unit profile shows it fending off Davion attack in 3024.
  59. Mercenaries Supplemental Update - The 48th, p. 24
  60. Technical Readout: 3075, p. 198, "Colossus"
  61. 61.0 61.1 Jihad Hot Spots: Terra, p. 71, "Epsilon Eridani Liberated"
  62. Field Manual: 3145, p. 140
  63. Turning Points: Epsilon Eridani - Avenging Angels, p. 7
  64. House Liao (The Capellan Confederation), p. 105, "Unit Deployment Table"
  65. Historical: War of 3039, p. 138 "Deployment Table"
  66. 20 Year Update, p. 24
  67. Chaos March, p. 33
  68. 68.0 68.1 Mercenaries Supplemental , p. 66, "Mercenary Deployment Table"
  69. 69.0 69.1 Mercenaries Supplemental, p. 70, "Mercenary Employment Table"
  70. 70.0 70.1 Jihad Secrets: The Blake Documents, p. 110, "Word of Blake Mercenary Deployments"
  71. Field Manual: 3085, p. 187, "RAF Deployment Table - 3085"
  72. Field Manual: 3145, p. 144, "Republic Armed Forces - Principes Guards"
  73. 73.0 73.1 73.2 73.3 73.4 Turning Points: Epsilon Eridani - Atlas, p. 5
  74. Dark Age: 3132-3134 INN, p. 130
  75. 75.0 75.1 75.2 Lawyers, Guns, & Money
  76. Wolf's Dragoons (sourcebook), p. 44, "Theories On Dragoon Origins"