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


Dyev neighbouring systems
Dyev neighbouring systems
System information
X:Y Coordinates 5.68 : 40.79[e]
Spectral class K8III[1]
Planets 6[1]

The Dyev system was home to at least one habitable world, Dyev I, and as at 3145 was located in the Dieron Prefecture of the Dieron Military District within the Draconis Combine.[2][3]

System Description[edit]

The Dyev system is located near the Chaville and Imbros III systems[2] and consists of a class K8III primary orbited by six worlds, at least one of which is habitable.[1]

System History[edit]

The Dyev system was colonised during the First Exodus from Terra.[4]

Dyev I[edit]

Orbital view
Orbital view
System position 1[1]
Jump point
3 days[1]
Moons 1 (Uter)[1]
Surface gravity 1.04[1]
Atmospheric pressure Standard (Breathable)[1]
Equatorial temperature 50°C[1]
Surface water 27%[1]
Highest native life Mammals[1]
Reference Year 3130[1]
Ruler Tsubasa Daisuke (Governor)[1]
James Douglas (Planetary Legate)[1]
Capital Novaya Mensk[1]
Population 1,067,000,000 (3130)[1]

The innermost planet in the Dyev system, Dyev I - more commonly known simply as Dyev - has a single moon named Uter and is a warm, dry world prone to suffering from violent dust storms..[1]

Planetary History[edit]

Dyev was one of the worlds that was abandoned by the Terran Alliance following the Outer Reaches Rebellion and the Demarcation Declaration of 2242.[4] Having become independent as a result of the Demarcation Declaration, Dyev was subsequently added to the resurgent Terran Hegemony; whilst some worlds joined the Hegemony during its early years as a result of diplomatic and trade incentives, many more were conquered in "campaigns of persuasion" launched by Director-General James McKenna, the first of which began in 2316 and ended with the capture of Towne in 2317. Dyev was one of the worlds added to the Hegemony during or around the time of this first military campaign.[5][4][6]

Dyev's initial colonists were Russian and Slavic miners who hoped to take advantage of the vast mineral and metal ore content on the world. The downside to this was the dearth of fresh water on the world, which made farming difficult. For the first few centuries, Dyev relied on ice ships to bring in water. In the middle of the twenty-fifth century miners following a vein of ore broke through into a large underground sea of fresh water. With this new source of water available, Dyev stopped the ice ship deliveries.[1] By the end of the Reunification War Dyev had become one of the worlds within the Lone Star Province of the Terran Hegemony.[7]

Amaris Civil War[edit]

During the Amaris Civil War the Rim Worlds forces poisoned approximately 30% of the available water on Dyev in an attempt to break opposition to their rule. Until the world was liberated by SLDF forces, the Republican troops kept poisoning the water supply. After the fall of the Star League the world was taken by the Draconis Combine. The Combine devoted more effort to rebuilding the mining operations than purifying the water, so - a few centuries after the last ice ship had left Dyev - ice ship deliveries resumed. The Combine, and later the Lyran Commonwealth, would continue these shipments throughout the Succession Wars.[1]

The Jihad[edit]

During the Jihad Dyev was occupied by forces from the Word of Blake. As the allied coalition created by Devlin Stone began striking against Word of Blake Protectorate worlds the combined Clan Ghost Bear and Clan Snow Raven task force which had agreed to support the coalition struck at a number of Blakist worlds on the 21st of July 3076. Dyev was one of the worlds targeted by the Clan forces, along with the nearby worlds of Kervil, Ko, Lambrecht, Moore and Sabik.[8][9] The Word of Blake launched a counter-assault on Dyev in mid-December, with the Blakist ground troops receiving support from a number of WarShips and Pocket WarShips.[9][10][11] The resulting battles saw three Blakist WarShips destroyed, the Whirlwind-class destroyer Fire Fang, the Aegis-class heavy cruiser WoBS Righteous Fury and the Congress-class frigate WoBS Hollings York.[12] However, the Blakist vessels took on three Ghost Bear WarShips[13] - the Leviathan II-class battleship CGB Rasalhague, the Nightlord-class battleship CGB Ursa Major and the Clan Snow Raven Aegis-class CSR Scabbard. As the Blakist WarShips and their accompanying Pocket WarShips and Assault DropShips engaged the Clan WarShips, a second Blakist force arrived and delivered multiple troop DropShips onto Dyev, with two-thirds of the troops surviving and dispersing to avoid orbital bombardment from the Clan ships. The Clans took a heavy toll on the Blakist WarShips, but the Scabbard was destroyed and the Ursa Major was heavily damaged.[14]

The Blakist counter assaults saw forces consisting of the Twenty-eighth and Thirty-second Militia Divisions augmented by the Third Bryant, First Lipton, Second New Earth and First Zosma Protectorate Militia Divisions land around Trogport and the planetary capital, Novaya Mensk. Blakist media sources claimed that the 28th, Bryant and Lipton Division forces used mine tunnels connecting to the Tupik chasm to hold off forces from the Ghost Bear Alpha and Omega Galaxies. The media sources also reported that the Thirty-second, New Earth and Zosma Divisions were using the fortifications established on Dyev by the Draconis Combine to resist attacks from the Ghost Bear Kappa and Pi Galaxies.[11] History records that the twenty-eighth and Thirty-second Militia Divisions were subsequently destroyed on Dyev before the end of 3076.[15]

Political Affiliation[edit]

Planetary Rulers[edit]


  • Planetary Governor Tsubasa Daisuke[1]
  • Planetary Legate James Douglas[1]

Military Deployment[edit]



  • Twenty-second Dieron Regulars[63]


Dyev has relatively little surface water, with the bulk of that tied up in two small oceans - the Morye Syevir ocean in the northern hemisphere and hte larger Aleutican Ocean in the southern hemisphere. The bulk of the fresh water found underground on Dyev is located under the large canyons in the northern hemisphere.[1]

Planetary Locations[edit]

  • Novaya Mensk: the planetary capital city, located on the eastern shore of the Morye Syevir ocean.[1]
  • Trogport: located just south of the Aleutican Ocean, Trogport is a large spaceport city and the main hub of interstellar commerce on Dyev.[1]
  • Tupik Chasm: the site at which fresh water was first discovered underground on Dyev,[1] and the site of battles during Operation SCOUR.[11]

Nearby Systems[edit]

Systems within 60 light-years (distance in light years)
Closest systems first:
Imbros III 10.2 Chaville 13.2 Lone Star 14.1 Pike IV 14.5
Asta 15.3 Athenry 15.4 Lambrecht 18.5 Moore 23.2
Ko 23.9 Yorii 23.9 Atria 24.2 Sabik 24.5
Styx 25.2 Dieron 26.6 Altair 27.2 Rocky 27.5
Kervil 28.9 Inglesmond 29.0 Killbourn 29.7 Kuzuu 31.1
Nai-Stohl 31.8 Saffel 35.1 Nirasaki 35.8 Dromini VI 36.7
Ascella 36.8 Telos IV 38.2 Deneb Algedi 38.3 Fomalhaut 38.5
Rigil Kentarus 39.1 Kaus Media 39.3 Skondia 40.2 Nusakan 40.5
Zollikofen 40.7 Terra 41.1 Alkalurops 41.8 New Earth 41.8
Muphrid 41.8 Caph 41.9 Nashira 42.5 Kaus Australis 42.6
Thorin 43.9 Menkent 47.4 Alrakis 48.4 Miyazaki 48.7
Pacifica (Chara) 48.9 La Blon 49.3 Quentin 49.3 Sirius 49.3
New Stevens 49.7 Elix 50.1 Keid 50.9 Lockdale 51.5
Northwind 52.1 Summer 52.2 Lipton 52.4 Procyon 52.9
New Home 53.5 Alula Australis 54.4 Bryant 54.5 Al Na'ir 55.2
Zavijava 55.6 Kaus Borealis 55.8 Alphecca 56.5 Haddings 56.5
Zebebelgenubi 58.2 Shitara 58.6 Graham IV 58.9 Eltanin 59.0
Unukalhai 59.4 Alya 59.5 Errai 59.8 Galatea 59.8


  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 Dark Age: Republic Worlds (3130), p. 8, "Dyev World Profile"
  2. 2.0 2.1 2.2 Era Report: 2750, p. 37, "Inner Sphere - [2750] Map"
  3. 3.0 3.1 Field Manual: 3145, p. VI, "Inner Sphere - [3145] Map"
  4. 4.0 4.1 4.2 4.3 Handbook: House Marik, p. 16, "Free Worlds League Founding - [2271] Map"
  5. The Star League, p. 16, "Terra's Errant Flock"
  6. 6.0 6.1 Handbook: House Kurita, p. 18, "Draconis Combine Founding [2319]"
  7. 7.0 7.1 Historical: Reunification War, p. 159, "Inner Sphere - [2596] Map"
  8. Jihad Hot Spots: Terra, p. 22, "Timeline of the Jihad"
  9. 9.0 9.1 Jihad: Final Reckoning, p. 56, "The Jihad In Review"
  10. Jihad Hot Spots: Terra, p. 23, "Timeline of the Jihad"
  11. 11.0 11.1 11.2 Jihad Hot Spots: Terra, p. 18, "A Time Of Cleansing"
  12. Jihad: Final Reckoning, p. 128, "Captured Ships"
  13. Jihad Hot Spots: Terra, p. 20, "Autopsy Of Dyev"
  14. Jihad Hot Spots: 3076, p. 87-88, "Dyev Hit By Blakist Counterattack!"
  15. Jihad: Final Reckoning, p. 126, "Word Of Blake Militia"
  16. Handbook: House Steiner, p. 13, "Lyran Commonwealth Founding - [2341] Map"
  17. Handbook: House Steiner, p. 25, "Lyran Commonwealth after Age of War - [2571] Map"
  18. Handbook: House Kurita, p. 31, "Draconis Combine after Age of War - [2571] Map"
  19. Field Manual: SLDF, p.vii, "Inner Sphere - [2764] Map"
  20. Historical: Liberation of Terra Volume 1, p. 11, "Inner Sphere - [2765] Map"
  21. Field Report 2765: Lyran Commonwealth, p. 25, "Lyran Commonwealth Armed Forces Deployment Map - [2765]"
  22. Historical: Liberation of Terra Volume 1, p. 104, "Rim Worlds Republic - [2767] Map"
  23. 23.0 23.1 Historical: Liberation of Terra Volume 1, p. 138, "Operation LIBERATION Wave 1 [July 2772 - December 2774]"
  24. 24.0 24.1 Handbook: House Kurita, p. 43, "Draconis Combine after First Succession War - [2822] Map"
  25. Handbook: House Steiner, p. 36, "Lyran Commonwealth after First Succession War - [2822] Map"
  26. Historical: Liberation of Terra Volume 2, p. 122-123, "Inner Sphere - [2822] Map"
  27. Handbook: House Steiner, p. 40, "Lyran Commonwealth after Second Succession War - [2864] Map"
  28. House Kurita (The Draconis Combine), "Draconis Combine Map - [3025]"
  29. Handbook: House Kurita, p. 64, "Draconis Combine after Third Succession War - [3025] Map"
  30. House Steiner (The Lyran Commonwealth), "Lyran Commonwealth Map - [3025]"
  31. Handbook: House Steiner, p. 47, "Lyran Commonwealth after Third Succession War - [3025] Map"
  32. House Davion (The Federated Suns), "Federated Suns Map - [3025]"
  33. Handbook: House Davion, p. 70, "Federated Suns after Third Succesion War - [3025] Map"
  34. Handbook: House Steiner, p. 56, "Lyran Commonwealth after Fourth Succession War - [3030] Map"
  35. Handbook: House Kurita, p. 66, "Draconis Combine after Fourth Succession War - [3030] Map"
  36. Handbook: House Davion, p. 71, "Federated Suns after Fourth Succesion War - [3030] Map"
  37. Handbook: House Steiner, p. 56, "Lyran Commonwealth after War of 3039 - [3040] Map"
  38. Handbook: House Davion, p. 76, "Federated Suns after War of 3039 - [3040] Map"
  39. Handbook: House Kurita, p. 68, "Draconis Combine after War of 3039 - [3040] Map"
  40. Historical: War of 3039, p. 133, "Inner Sphere - [3040] Map"
  41. Era Report: 3052, p. 11, "Inner Sphere - [3050] Map"
  42. Era Report: 3052, p. 23, "Inner Sphere - [3052] Map"
  43. Handbook: House Steiner, p. 61, "Lyran Commonwealth after Clan Invasion - [3052] Map"
  44. Handbook: House Kurita, p. 71, "Draconis Combine after Operation REVIVAL - [3052] Map"
  45. Era Report: 3062, p. 11, "Inner Sphere Map [3057]"
  46. Handbook: House Davion, p. 78, "Federated Suns after Operation Guerrero - [3058] Map"
  47. Era Report: 3062, p. 29, "Inner Sphere Map [3063]"
  48. Inner Sphere (sourcebook), p. 33, "Federated Suns Map"
  49. Handbook: House Steiner, p. 70, "Lyran Alliance after FedCom Civil War - [3067] Map"
  50. Handbook: House Kurita, p. 74, "Draconis Combine after FedCom Civil War - [3067] Map"
  51. Handbook: House Davion, p. 82, "Federated Suns after FedCom Civil War - [3067] Map"
  52. Jihad: Final Reckoning, p. 43, "Inner Sphere - [3067] Map"
  53. Jihad Secrets: The Blake Documents, p. 65, "Inner Sphere - [3075] Map"
  54. Field Report: LAAF, p. 19, "Lyran Alliance Armed Forces Deployment Map - [August 3079]"
  55. Field Report: DCMS, p. 21, "Draconis Combine Mustered Soldiery Deployment Map - [August 3079]"
  56. Field Report: Clans, p. 29, "Terran Corridor Clans Deployment Map - [August 3079]"
  57. Jihad: Final Reckoning, p. 63, "Inner Sphere - [3081] Map"
  58. Field Manual: 3085, p. 127, "Inner Sphere - [3085] Map"
  59. Map of the Inner Sphere 3130
  60. Era Report: 3145, p. 11, "Inner Sphere - [3135] Map"
  61. Era Report: 3145, p. 39, "Inner Sphere - [3145] Map"
  62. Historical: War of 3039, p. 138 "Deployment Table"
  63. 20 Year Update, p. 40, "Draconis Combine Deployment Table"