This article is undergoing revision as part of Project: Planets, a collaborative effort to improve BattleTechWiki's coverage of planets and systems. If you would like to participate, please visit the project page, where you can add your name to the list of volunteers.

This article has completed Phase 0 of the Overhaul effort.

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

Derf neighbouring systems
Derf neighbouring systems
System information
X:Y Coordinates -130.74:397.49[e]

Political Affilation[edit]

Planetary History[edit]

Early History[edit]

Derf was one of seven worlds settled by colonists from the Rim Worlds Republic between 2334 and 2338 as an attempt by Maxwell Rowe to create a buffer zone between the Republic, the Draconis Combine and the Tamar Pact.[1]

Reunification War[edit]

By the end of the Age of War Derf was a part of the Apollo Province of the Rim Worlds Republic.[2]

Civil war erupted in the Rim Worlds Republic in 2575, with the factions polarized around those loyal to First Consul Gregory Amaris and those loyal to the Rift Republican Army and the Rim Provisional Government.[31] The Star League eventually decided to intervene in the civil war in support of Gregory Amaris, and in 2579 assembled Task Force MAILED FIST to help secure Amaris' control over the Rim Worlds Republic. A multinational force headed by the Star League Defense Force, Task Force MAILED FIST was responsible for executing Operation MAILED FIST, the name given to the military intervention. the first wave of attacks focused on securing significant worlds near Apollo,[32] until a destructive raid on Alarion by the 4th Amaris Fusiliers in retaliation prompted the SLDF to alter its initial strategy for the campaign, the focus shifted to reducing Rim Worlds Army concentrations throughout the Republic and the capture of key worlds.[33]

In late 2584 the SLDF changed tactics again; a number of major RWA units had been destroyed or captured, and the focus for the campaign shifted to capturing worlds of strategic importance, but the campaign was slowed by the greatly increased resistance offered by the RWA and local civilian populations, prompted by atrocities performed by the Draconis Auxiliary Corps when they captured Nightwish in mid-2584. The conquest of Derf was one such example of a campaign that took longer than originally planned due to the level of resistance offered by the civilian population; General Nathan Isaacson of Battle Group Apollo assigned the Seventeenth Royal Division - one of three divisions that comprised VI Corps - to conquering Derf in 2586, but even a year after the planetary capital had been occupied instances of civil unrest were still occurring.[34][35]

Star League Era[edit]

Derf was conquered by the Lyran Commonwealth during the 2773-2775 Republic-Commonwealth war.[9]

Clan Invasion[edit]

Derf was conquered by Clan Jade Falcon during the Second Wave of Operation Revival in May 3050. The 3rd Falcon Talon made their landing on the planet, intending to finish off the survivors of the 12th Donegal Guards who had escaped from Trell I. However, so dishearten were the Donegal Guards at their earlier defeat that many simply gave up without a fight. Those few who continued to resist were easily crushed and by the end of the day the planet belonged to the Jade Falcons.[36]


The planet was invaded again during the Jihad, when Clan Ice Hellion launched an invasion of the Clan Jade Falcon holdings in the Inner Sphere in early 3071. Derf was invaded by the Ice Hellions between the 7th and 28th of June 3071, but the Ice Hellion invasion stalled as heavy fighting continued on Wotan and other worlds throughout July 3071.[22][23]

Military Deployment[edit]






Nearby Planets[edit]

Planets within 2 jumps (60 light-years)
Closest planets first:
Planet Distance (LY) Jumps 2750 3025 3030 3040 3052 3057 3062
Wotan 17.97 1 RWR LC LC FC CJF CJF CJF
Trell I 18.67 1 LC LC LC FC CJF CSV CJF
Butler 20.11 1 LC LC LC FC CJF CJF CJF
Winfield 22.05 1 RWR LC LC FC CJF CJF CJF
Malibu 22.38 1 RWR LC LC FC CJF CJF CJF
Persistence 27.41 1 RWR LC LC FC CJF CSV CJF
Golandrinas 29.51 1 RWR LC LC FC CJF CJF CJF
Maxie's Planet 35.07 2 LC LC LC FC CJF CJF CJF
Waldorff 36.27 2 LC LC LC FC CSV CSV CJF
Twycross 37.36 2 LC LC LC FC CSV CSV CJF
Steelton 37.66 2 RWR LC LC FC CJF CJF CJF
Apollo 38.10 2 RWR LC LC FC CJF CJF CJF
Toland 40.01 2 RWR LC LC FC CJF CJF CJF
Blackjack 40.31 2 LC LC LC FC CSV CSV CJF
Somerset 42.64 2 RWR LC LC FC FC LA LA
Romulus 44.22 2 LC LC LC FC CJF CJF CJF
Goat Path 47.78 2 LC LC LC FC CSV CSV CJF
Hot Springs 48.47 2 LC LC LC FC CJF CJF CJF
Black Earth 50.09 2 LC LC LC FC CJF CJF CJF
Bensinger 50.38 2 RWR LC LC FC CJF CSV CJF
Denizli 51.00 2 LC LC LC FC CJF CJF CJF
Icar 51.48 2 RWR LC LC FC CW CW CW
Evciler 52.59 2 LC LC LC FC CJF CJF CJF
Alyina 54.40 2 LC LC LC FC CJF CJF CJF
Chateau 55.56 2 LC LC LC FC CW CW CW
Anywhere 55.63 2 RWR LC LC FC CJF CJF CJF
Apolakkia 56.68 2 LC LC LC FC CJF CJF CJF
Seiduts 59.53 2 LC LC LC FC CJF CJF CJF


  1. 1.0 1.1 The Periphery, 1st Edition, p. 18, "From Rim to Tamar"
  2. 2.0 2.1 Handbook: Major Periphery States, p. 18, "Rim Worlds Republic after Age of War [2571]"
  3. Handbook: House Steiner, p. 25, "Lyran Commonwealth after Age of War [2571]"
  4. Historical: Reunification War, p. 158, "Inner Sphere Map [2596]"
  5. Handbook: Major Periphery States, p. 25, "Rim Worlds Republic At the Fall of the Star League [2750]"
  6. Era Report: 2750, p. 37, "Inner Sphere - 2750"
  7. Field Manual: SLDF,Map: Inner Sphere 2764
  8. Historical: Liberation of Terra Volume 1, Map: Inner Sphere 2765
  9. 9.0 9.1 Handbook: Major Periphery States, p. 37, "The Republic-Commonwealth War"
  10. Handbook: House Steiner, p. 36, "Lyran Commonwealth after First Succession War [2822]"
  11. Handbook: House Steiner, p. 40, "Lyran Commonwealth after Second Succession War [2822]"
  12. Handbook: House Steiner, p. 47, "Lyran Commonwealth after Third Succession War [3025]"
  13. Handbook: House Steiner, p. 56, "Lyran Commonwealth after Fourth Succession War [3030]"
  14. Handbook: House Steiner, p. 59, "Lyran Commonwealth after War of 39 [3040]"
  15. Historical: War of 3039, p. 133, "Inner Sphere - 3040"
  16. 16.0 16.1 Era Report: 3052, p. 11, "Inner Sphere - 3050"
  17. Handbook: House Steiner, p. 61, "Lyran Commonwealth after Clan Invasion [3052]"
  18. Era Report: 3062, p. 11, "Inner Sphere Map [3057]"
  19. Era Report: 3062, p. 29, "Inner Sphere Map [3063]"
  20. Handbook: House Steiner, p. 70, "Lyran Commonwealth after FedCom Civil War [3067]"
  21. Jihad: Final Reckoning, p. 43, "Inner Sphere Map - [October 3067]"
  22. 22.0 22.1 Jihad Hot Spots: 3076, p. 16, "Timeline of the Jihad"
  23. 23.0 23.1 Jihad: Final Reckoning, p. 49, "The Jihad In Review"
  24. Jihad Secrets: The Blake Documents, p. 65, "Inner Sphere [3075]"
  25. Field Report: Clans, p. 26, "Clan Jade Falcon Deployment Map"
  26. Jihad: Final Reckoning, p. 62, "Inner Sphere Map - [March 3081]"
  27. Field Manual: 3085, p. vii, "Inner Sphere Map - [October 3085]"
  28. Map of the Inner Sphere 3130
  29. Era Report: 3145, p. 11, "Inner Sphere Map - [3135]"
  30. Era Report: 3145, p. 39, "Inner Sphere Map - [3145]"
  31. Historical: Reunification War, p. 130, "The Spark"
  32. Historical: Reunification War, p. 132, "Case Apollo"
  33. Historical: Reunification War, p. 133, "Island Hopping (2582 - November 2590)"
  34. Historical: Reunification War, p. 134, "Arlina to viborg (December 2584 - September 2588)"
  35. 35.0 35.1 Historical: Reunification War, p. 152, "Rim Worlds Republic Front (Jump-off - 2587)"
  36. Jade Falcon Sourcebook, p. 39
  37. Field Report 2765: Periphery, p. 19, "Republican Guards - Divisional Status"
  38. Field Report: Clans, p. 15, "Clan Jade Falcon Deployment Status"
  39. Field Manual: 3145, p. 167, "Clan Force Deployments - Clan Hell's Horses"
  40. House Steiner (The Lyran Commonwealth), p. 142, "Other Major Commonwealth Industries"