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

Caldrea nearby systems (3151)
Caldrea nearby systems (3151)
(Map Legend)
System Information
X:Y Coordinates 33.853 : 193.307[e]

The Caldrea system was home to at least one habitable world or construct and as at 3145 was located in the Buckminster Prefecture of the Benjamin Military District within the Draconis Combine.[1][2]

System Description[edit]

The Caldrea system is located near the Dove and Pilkhua systems.[3]

System History[edit]

The Caldrea system was settled at some point during or shortly after the First Exodus from Terra.[4]

Political Affiliation[edit]

Planetary History[edit]

Age of War[edit]

Caldrea was a target of the Lyran Commonwealth offensive known as the Long March, the most ambitious military campaign the Commonwealth had launched up to that point in time. The campaign began in 2463 and was initially successful, misdirecting the DCMS into believing the target of the offensive was St. John and allowing the Lyrans to capture a number of border worlds as well as the worlds of Skondia and Nox, partly through their use of BattleMechs, a technology the Draconis Combine had yet to field.[45]

By the time the Lyran forces assaulted Caldrea, the Lyran military had been on the offensive for four years, and despite the constant rotation of tired troops out and reinforcements in, fatigue on both the military personnel and their equipment was taking a serious toll. Caldrea was fiercely defended by the DCMS forces; the discovery that the northern continent of Caldrea was a rugged mountainous maze riddled with traps and prepared defenses was too much for the Lyrans, who resorted to breaching the Ares Conventions by using nuclear weapons to clear the mountains. This left Caldrea under Lyran control, but left the planet half-devastated and of little use to the Commonwealth.[45]

The Lyran campaign to capture Caldrea was detailed in books such as The Caldrea Debacle, published by Mountain Press in 2500; authored by Timothy Asd, the book detailed actions such as the unsuccessful attack on The Cassino, the fortress that guarded the Kelli pass and which saw the Lyran Twenty-Third BattleMech Battalion destroyed or heavily damaged and the battalion's CO, Colonel Yoller, killed in action, highlighting the reasons behind the decision to use nuclear weapons to complete the conquest of Caldrea.[46]

First Succession War[edit]

Caldrea was captured by the Draconis Combine in 2812, using fast-moving BattleMech forces that were able to defeat the defending forces despite the defenders using nuclear weapons in an effort to try and resist the invasion.[13]

After the Fourth Succession War[edit]

The planet was attacked in 3030 by the Gray Death Legion in order to conquer the planet as it was expected to be used as a jump-point for the 1st Lyran Guards for their assault on Narve. The planet was in theory defended only by militia units, but what they found was a line DCMS unit.[47]

Military Deployment[edit]





  • Fifth Sun Zhang Academy Cadre[49]


  • Fifth Sun Zhang Academy Cadre[50]

Planetary Locations[edit]

  • Narve: The planet's capital city.[47]
  • Trothas: A small industrial city on the outskirts of Narve.[47]


There are discrepancies between House Kurita (The Draconis Combine) and House Steiner (The Lyran Commonwealth) over the dates of the Lyran assault on Caldrea during the Age of War. House Steiner (The Lyran Commonwealth) places the Lyran invasion as "four years after" the Long March began, which would place the assault in 2467;[45] however, House Kurita (The Draconis Combine) describes Caldrea being taken by the Commonwealth two years earlier, in 2465.[6]

Nearby Systems[edit]

Closest 52 systems (51 within 60 light-years)
Distance in light years, closest systems first:
Pilkhua 12.9 Dove 14.8 Shirotori 16.2 Sulafat 17.1
Numki 17.1 Najha 17.9 Chandler 19.2 Fefferfer 19.4
Trolloc Prime 22.2 Rubigen 24.8 Glenlivet 27.0 Kiesen 28.6
Dehgolan 29.0 Toffen 29.5 Darius 33.3 Altenmarkt 36.6
Mannedorf 36.9 Meilen 37.1 Sendai 39.0 Grumium 39.3
Eguilles 40.0 Chimpaw 40.5 Tukayyid 41.9 Buckminster 41.9
Odabasi 42.5 Camlann 43.3 Krenice 43.5 Arkab 44.1
Utrecht 44.4 Ramsau 44.9 Port Moseby 45.0 Setubal 45.4
Baldur 46.3 Otho 47.7 Ueda 50.1 Kingtribel 50.9
Nox 50.9 Lothan 51.6 Diosd 51.9 Maule 52.0
Ogano 52.3 Aix-la-Chapelle 52.6 Gram 53.0 Ardoz 53.9
Dumaring 54.7 Aubisson 55.3 Karbala 57.7 Halesowen 58.5
Shimosuwa 59.2 Skandia 59.2 Kiamba 59.6 Al Hillah 61.0


  1. 1.0 1.1 Era Report: 3145, p. 39, "Inner Sphere Map - [3145]"
  2. 2.0 2.1 Field Manual: 3145, p. VI, "Inner Sphere - 3145"
  3. 3.0 3.1 Era Report: 2750, p. 37, "Inner Sphere - 2750"
  4. 4.0 4.1 Handbook: House Steiner, p. 13, "Lyran Commonwealth at their founding in [2341]"
  5. Handbook: House Kurita, p. 18, "Draconis Combine Founding" - 2319
  6. 6.0 6.1 6.2 House Kurita (The Draconis Combine), p. 35, "Battles in the Age of War"
  7. Handbook: House Steiner, p. 25, "Lyran Commonwealth after Age of War [2571] Map"
  8. Handbook: House Kurita, p. 31, "Draconis Combine after Age of War - 2571"
  9. Historical: Reunification War, p. 159, "Inner Sphere Map [2596]"
  10. Field Manual: SLDF, Inner Sphere - [2764]
  11. Historical: Liberation of Terra Volume 1, p. 11, "Inner Sphere - 2765"
  12. First Succession War, p. 24-25, "Inner Sphere - 2786"
  13. 13.0 13.1 First Succession War, p. 74, "Stumbling Onward"
  14. Handbook: House Steiner, p. 36, "Lyran Commonwealth after First Succession War [2822] Map"
  15. Handbook: House Kurita, p. 43, "Draconis Combine after First Succession War - 2822"
  16. Historical: Liberation of Terra Volume 2, p. 122-123, "Inner Sphere - 2822"
  17. First Succession War, p. 112-113, "Inner Sphere - 2822"
  18. Handbook: House Steiner, p. 40, "Lyran Commonwealth after Second Succession War [2864] Map"
  19. Handbook: House Kurita, p. 53, "Draconis Combine after Second Succession War - 2864"
  20. House Kurita (The Draconis Combine), "Draconis Combine Map - [3025]"
  21. Handbook: House Kurita, p. 64, "Draconis Combine after Third Succession War - 3025"
  22. House Steiner (The Lyran Commonwealth), Lyran Commonwealth Map [3025]
  23. Handbook: House Steiner, p. 47, "Lyran Commonwealth after Third Succession War [3025] Map"
  24. Handbook: House Kurita, p. 66, "Draconis Combine after Fourth Succession War - 3030"
  25. Handbook: House Steiner, p. 56, "Lyran Commonwealth after Fourth Succession War [3030] Map"
  26. Historical: War of 3039, p. 133, "Inner Sphere - 3040"
  27. Handbook: House Kurita, p. 68, "Draconis Combine after War of 3039 - 3040"
  28. Handbook: House Steiner, p. 59, "Lyran Commonwealth after War of 3039 [3040] Map"
  29. Era Report: 3052, p. 11, "Inner Sphere Map [3050]"
  30. Era Report: 3052, p. 23, "Inner Sphere Map [3052]"
  31. Handbook: House Kurita, p. 71, "Draconis Combine after Operation REVIVAL - 3052"
  32. Handbook: House Steiner, p. 61, "Lyran Commonwealth after Clan Invasion [3052] Map"
  33. Era Report: 3062, p. 11, "Inner Sphere Map [3057]"
  34. Era Report: 3062, p. 29, "Inner Sphere Map [3063]"
  35. Handbook: House Kurita, p. 74, "Draconis Combine after FedCom Civil War - 3067"
  36. Handbook: House Steiner, p. 70, "Lyran Commonwealth after FedCom Civil War [3067] Map"
  37. Jihad: Final Reckoning, p. 43, "Inner Sphere Map - [October 3067]"
  38. Jihad Secrets: The Blake Documents, p. 65, "Inner Sphere Map [3075]"
  39. Field Report: DCMS, p. 21, "DCMS Deployment Table [3079]"
  40. Field Report: LAAF, p. 19, "Lyran Alliance Deployment Table [3079]"
  41. Jihad: Final Reckoning, p. 63, "Inner Sphere Map - [March 3081]"
  42. Field Manual: 3085, p. 127, "Inner Sphere Map - [October 3085]"
  43. Map of the Inner Sphere 3130
  44. Era Report: 3145, p. 11, "Inner Sphere Map - [3135]"
  45. 45.0 45.1 45.2 House Steiner (The Lyran Commonwealth), p. 22, "Long March, Hard March"
  46. House Steiner (The Lyran Commonwealth), p. 23, "Long March, Hard March"
  47. 47.0 47.1 47.2 Gray Death Legion sourcebook, pp. 54-55 "Night Strike"
  48. 48.0 48.1 First Succession War, p. 139, "Lyran Commonwealth Armed Forces (LCAF)"
  49. 49.0 49.1 Historical: War of 3039, p. 139, "Deployment Table"
  50. 20 Year Update, p. 43, "Draconis Combine Deployment Table"