Cavanaugh 3151.svg
System Information
X:Y Coordinates-307.125 : -52.558[e]
Spectral classM9II[1][2]
Recharge time210 hours[1][2]
Recharge station(s)Zenith[1][2]

The Cavanaugh system is home to at least one habitable world, Cavanaugh II, and as of 3151 was located in the Duchy of Tamarind-Abbey province of the Free Worlds League.[3]

System Description[edit]

Cavanaugh is located near the Epsilon and Nockatunga systems[4][5] and consists of a class M9II primary orbited by at least two planets. During the thirty-first century a recharge station was in place at the system zenith jump point.[1][2]

System History[edit]

The Cavanaugh system was colonized at some point during or shortly after the First Exodus from Terra and was a member of the Free Worlds League by the end of the Age of War.[6][7]

Political Affiliation[edit]

Cavanaugh II[edit]

Cavanaugh II
Cavanaugh II Flag.jpg
System positionFourth[1][2]
Jump Point distance1.96 days[1][2]
Moons4 (Cambriae, Gododin, Nennius, Tennyson)[1][2]
Surface gravity0.99[1][2]
Atmospheric pressureStandard (Breathable)[1][2]
Equatorial temperature40°C (Warm-Temperate)[1][2]
Surface water80%[1][2]
Highest native lifeAmphibians[1][2]
Landmasses5 (Bedivere, Gareth, Gawain, Mordred, Tristram)[1][2]
History and Culture
Population932,827,000 (3067),[1]
935,130,000 (3079)[2]
Government and Infrastructure
Noble RulerDuke of Cavanaugh
HPG ClassB[1][2]

Planetary History[edit]

Cavanaugh was discovered in 2290 and then sold in 2325 to a member of the former English court, Duke Alvin Windsor-Moon. Among the first settlers were the Arthurian Actors Guild, and many of the locations on the world take their names from Arthurian legends.[1]

The Age of War[edit]

Cavanaugh II was one of the worlds the Lyran Commonwealth managed to recapture from the Free Worlds League in 2468 thanks to the use of BattleMechs, a military asset that the League wouldn't be able to field until 2470.[7]

First Succession War[edit]

Cavanaugh II was one of a number of Lyran Commonwealth border worlds to be struck by a devastating cross-border raids by the Free Worlds League between 2786 and 2790, as the Lyran Commonwealth Armed Forces began to crack under the pressure of continuing efforts to annex the Bolan Thumb while also attempting to maintain a defensive posture against both the Draconis Combine Mustered Soldiery and the Free Worlds League Military.[40]

Third Succession War[edit]

In 2952, Free Worlds League forces spearheaded by the Third Marik Militia successfully invaded Cavanaugh II. Suspicious of the Third's abilities, the Commonwealth prioritized a headhunting mission against the Third's commander over retaking the planet. The Eridani Light Horse succeeded in killing him and confirmed him as the Commonwealth traitor Mikhail Tertren.[17]

Apocryphal Content Starts

The information after this notice comes from apocryphal sources; the canonicity of such information is uncertain.
Please view the reference page for information regarding their canonicity.

Looking to exact revenge on Nik's Cavaliers for disrupting their attack on Cole Harbour, the Black Inferno mercenary group attempted to ambush them on Cavanaugh by replicating the conditions, going so far as to sacrifice a few tanks and 'Mechs on the ground to sell the deception and lure the Cavaliers into the port city, where Inferno had been waiting. Though the Cavaliers were able to fight through the trap, it was only part of their operation. Knowing their Leopard-class DropShip would have to eventually come down to the planet—either to extract their lance or rescue them—two Inferno aerospace fighters attempted to cripple the Leopard while it was in low orbit. Cavaliers CO Ryana Campbell threw up a screen and took evasive action, and thanks to the modifications Chief Tech Fahad Arazad made on the engines, they were able to outrun the ASFs long enough for their team to clean up the Inferno forces on the planet. Now at a disadvantage, Black Inferno retreated.[41]

Apocryphal Content Ends

The Jihad[edit]

Following the invasion of the Free Worlds League by the Skye and Bolan Provinces of the Lyran Alliance in what was termed Operation ÜBERSCHATTEN, Marshall Jeremy Brett took command of the local FWLM and launched a counteroffensive, under the name Operation BROKEN FIST. BROKEN FIST went beyond simply attempting to recapture worlds that the Lyrans had seized, striking into Lyran space across numerous worlds. Cavanaugh II was one of the worlds hit and was assaulted by the League forces on 28 September 3068.[33]

Dark Age[edit]

Cavanaugh was conquered by the Seventh Tamarind Regulars and annexed to the reborn Free Worlds League in 3143.[39]

Military Deployment[edit]


  • Thirty-sixth Lyran Guards[45]
  • Ninth Lyran Regulars[45]


  • Thirty-sixth Lyran Guards RCT[47]
  • Ninth Lyran Regulars[47]



  • Sixth Donegal Guards RCT[49]





- The unit was operating at 40% strength, with 80% of their equipment featuring upgraded technology.




Cavanaugh II has five continents named Bedivere, Gareth, Gawain, Mordred, and Tristram.[1][2] Mordred is largely uninhabited due to volcanoes and earthquakes.[1]

Apocryphal Content Starts

The information after this notice comes from apocryphal sources; the canonicity of such information is uncertain.
Please view the reference page for information regarding their canonicity.

In the MechWarrior 5: Mercenaries Campaign Mission "Lock n' Load," Cavanaugh is depicted as an autumn forest biome with unlimited visibility.[41]

Apocryphal Content Ends

Planetary Locations[edit]

  • Bronsons Pass[57]
  • Caerleon: the planetary capital on a small island off Gawain[2]


Naming conventions on Cavanaugh II appear to have been strongly influenced by the tales and legends of King Arthur; the continents are named various for knights of the Round Table (Bedivere, Gareth, Gawain and Tristram) and the illegitimate son of King Arthur and his half-sister Morgaine (also referred to as Morgan or Morgana), Mordred. The capital city of Cavanaugh II, Caerleon, has the same name as the birthplace of Mordred and was the site of a large Roman settlement in Wales during the era of the Roman Empire, one of the three largest garrisons in Britain (the two contemporaries to Caerleon being York and Chester). The noted author Geoffrey of Monmouth wrote at length about Caerleon, making it one of the most important cities in Britain in his work and the capital city of King Arthur.

The four moons of Cavanaugh II, Cambriae, Gododin, Nennius and Tennyson are all names also associated with the legends around King Arthur; Nennius was a Welsh monk from the ninth century often accredited with authorship of the Historia Brittonum, which was the first historical text to portray King Arthur - although Arthur is depicted variously as a military leader, soldier and warrior but not a king. Cambriae is likely to be a references to the Annales Cambriae, or "The Annals of Wales", a collection of Cambro-Latin chronicles dating from approximately the twelfth and thirteenth century (although some works within the Annales Cambriae are purportedly copies of earlier tenth century texts) and which have been argued to contain two entries referencing King Arthur, one entry referencing Medraut (Mordred) and one on Merlin. The various entries cover the Battle of Badon, the Battle of Armterid and the Strife of Camlann.

The moon Gododin is most likely a reference to Y Gododdin, a Welsh medieval poem that recounts the elegies of Gododdin, an ancient Brittonic kingdom; Y Gododdin makes what may be the earliest known reference to what might also be King Arthur in the form of a comparison between one of the warriors recounted in the battle of Catraeth and Arthur. Lastly, Tennyson is likely a reference to Alfred Tennyson, a noted poet whose works include the most famous Victorian-era adaptation of the legend of King Arthur and the Knights of the Round Table, Morte d'Arthur.

Map Gallery[edit]

Nearby Systems[edit]

Closest 36 systems (35 within 60 light-years)
Distance in light years, closest systems first:
Epsilon 11.4 Nockatunga 18.2 Hell's Paradise 18.9 Promised Land 20.1
Malazan 25.9 Penobscot 26.7 Timbiqui 27.4 Zdice 28.6
Saltillo 30.2 Millungera 31.4 Ilion 32.2 Abramkovo 33.6
Griffith 35.8 Tylarzka 37.9 Kosciusko 38.7 Pencader 43.4
Rochers 46.5 Zuhbehr 47.0 Bobruisk 47.1 Schererville 47.5
Diamantina 47.6 Alula Borealis 48.2 Kamenz 48.4 Bella 48.5
Tamarind 49.0 Zebrenaski 51.2 Hornir's Keep 52.3 Galisteo 52.5
Trellisane 55.9 Alorton 57.2 Labouchere 58.1 Loongana 58.2
Simpson Desert 58.7 Edmondson 59.4 Biloela 59.5 Dixie 61.8


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  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 Objectives: Lyran Alliance, p. 15: "Cavanaugh II"
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  16. Handbook: House Steiner, p. 40
  17. 17.0 17.1 House Steiner (The Lyran Commonwealth), p. 71
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  32. Jihad: Final Reckoning, p. 43
  33. 33.0 33.1 Jihad: Final Reckoning, p. 46: "The Jihad In Review"
  34. Jihad Secrets: The Blake Documents, p. 65
  35. Field Report: LAAF, p. 19
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  41. 41.0 41.1 MechWarrior 5: Mercenaries, Campaign Mission 10: "Lock n' Load"
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  43. First Succession War, p. 138: "First Succession War Deployment Table - FWLM"
  44. 44.0 44.1 House Steiner (The Lyran Commonwealth), p. 117: "Unit Deployment Table"
  45. 45.0 45.1 45.2 45.3 45.4 45.5 NAIS The Fourth Succession War Military Atlas Volume 1, p.44, "Operation GÖTTERDÄMMERUNG"
  46. 46.0 46.1 Rolling Thunder, pp. 36–37: "Luck of the Draw"
  47. 47.0 47.1 Historical: War of 3039, p. 137: "Deployment Table"
  48. 20 Year Update, p. 28: "Federated Commonwealth Deployment Table"
  49. Objective Raids, p. 20: "FedCom Deployment Table"
  50. Shattered Sphere, p. 51: "Lyran Alliance Deployment Table"
  51. Field Manual: ComStar, p. 126: "Com Guards Deployment Table"
  52. 52.0 52.1 Field Manual: Updates, p. 179: "Lyran Alliance Deployment Table"
  53. Field Manual: Updates, p. 98: "Com Guards Deployment Table"
  54. Field Report: LAAF, p. 8: "Alliance Guards Regimental Status"
  55. Field Manual: 3085, p. 107: "Deployment Table - 3085"
  56. Field Manual: 3145, p. 116: "Free Worlds League Military"
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