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 2 of the Overhaul effort.

Rio neighboring systems
Rio neighboring systems
System Information
X:Y Coordinates 95.382 : -28.74[e]
Spectral class F8V[1]
Planets 6[1]

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

Orbital view
Orbital view
System position 4[1]
Jump point
12 days[1]
Moons 1 (Aires)[1]
Surface gravity 1.2[1]
Atmospheric pressure Standard (Breathable)[1]
Equatorial temperature 30°C[1]
Surface water 60%[1]
Highest native life Reptiles[1]
Reference Year 3130[1]
Ruler Hector Rodriquez (Governor)[1]
Katina Walker (Planetary Legate)[1]
Capital Reno[1]
Population 15,000,000[1]

Political Affiliation[edit]

Planetary Info[edit]

When first settled, Rio was a beautiful world covered in scenic valleys. With little to export, the world instead became known as a prime vacation spot, artists colony, and tri-vid production planet. In 2223 the world joined[1] - or was conquered by, depending on the historical account cited[2] - the Tikonov Union, and when that power merged into the Capellan Confederation, Rio separated and joined the Terran Hegemony. It would become one of the largest centers of fine art, high-end tourism, and film making in the first Star League.[1]

The planet has two continents Grando and Pequeno, the planetary capital is located on Grando.[1]

Planetary History[edit]

The Succession Wars[edit]

After the fall of the first Star League, Rio was contested by several factions. Initially annexed by the Federated Suns, Rio was conquered as part of a small-scale Capellan Confederation military operation launched in early 2787; in addition to capturing Rio, by August 2787 the CCAF had also captured two other former Hegemony worlds that had been annexed by the Federated Suns, Angol and Tybalt.[15] Soon, the Capellan Confederation and Draconis Combine were fighting for control of Rio.[1] While cross-border clashes and raids between the CCAF and DCMS had been relatively common in the 2790s, the first full-scale battle between the two over control of Rio occurred in late 2800. The Combine attempted to invade Rio with a regiment from the Dieron Regulars brigade, following the routing of Capellan forces on the nearby world of Ronel in March 2800. The situation on Ronel was rather different to that on Rio, however; the defending garrison, the First Chesterton Voltigeurs, began by intercepting the DCMS DropShips with aerospace fighters while the DropShips were entering the upper atmosphere, and successfully shot down two DropShips, which crashed into the surface south of the port city of San Lucas. The remaining Regulars' DropShips managed to land, but found themselves immediately subject to artillery fire from the Voltigeurs, forcing the DropShips to boost for safety as soon as the last 'Mechs had managed to disembark. The Regulars attempted to quickly seize San Lucas to use as a base for operations, only to discover that the Voltigeurs had rigged a number of the tallest buildings in the city to collapse using explosives, as well as mining half the streets. Within half an hour of landing, the Regulars found themselves trapped in a burning, fiery hell that had once been a pristine resort town on a world that had enjoyed a reputation as a holiday paradise during the Star League era.[55]

The Confederation finally won uncontested control of Rio in 2806, but only by using nuclear weapons. The radiation forced most of the population to flee, and in the end the Confederation had taken control of a dead world. This would later be a problem as the Federated Suns realized the system's valuable strategic position for raiding the Confederation. For most of the Succession Wars the AFFS used the world as a strategic jump-off point for raids into the Confederation. In 2980 the CCAF attempted to conquer the world with a large fleet of AeroSpace Fighters and other aerospace assets, but the fleet was soundly defeated. This defeat triggered a reorganization of the CCAF's aerospace arm.[1]

The Jihad[edit]

A member of the Word of Blake Protectorate during the Jihad, Rio was one of the first worlds to be scouted by the allied coalition forged by Devlin Stone; scouts raided Rio and a number of other Protectorate worlds on the 25th of March 3076.[56][57] This was followed with an assault by coalition forces on the 1st of July. The allied assault on Rio was one of four planetary assaults on Protectorate worlds that took place simultaneously, with the other assault forces targetting the Al Na'ir, Rochelle and Van Diemen IV systems.[58][59]

Military Deployment[edit]






- At this point in time, the IV Triarii was at 50% of full strength, with 52% of their equipment featuring upgraded technology.


- At this point in time, the unit was at 65% of full strength with a "C" equipment rating.

Nearby Systems[edit]

Systems within 60 light-years (distance in light years)
Closest systems first:
Tybalt 13.71 Mirach 15.26 Angol 17.58 New Rhodes III 19.90 Tikonov 20.90
Tigress 21.46 Achernar 21.72 New Florence 21.84 Caselton 24.01 Ronel 26.36
Basalt 29.48 Schedar 29.97 Mira 31.27 Alrescha 31.54 Mesartim 33.34
Yangtze 34.64 Hean 34.91 Almach 38.25 New Hessen 39.30 Ankaa 40.07
Edwards 40.32 Sonnia 41.35 Ozawa 42.13 Kawich 42.39 Nopah 43.16
Ruchbah 43.95 Demeter 44.73 Hamal 45.24 Deneb Kaitos 46.54 Galatia III 48.09
Bharat 49.38 Mallory's World 50.66 Waycross 51.69 Elbar 51.96 Addicks 51.99
Fletcher 53.78 Markab 54.28 Logandale 55.05 Ingress 55.84 Skat 57.65
Tianamon 58.33 Kansu 58.68 Woodstock 59.19


  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 Dark Age: Republic Worlds (3130), p. 83, "Rio World Profile"
  2. 2.0 2.1 House Liao (The Capellan Confederation), p. 20
  3. Handbook: House Kurita, p. 18, "Draconis Combine Founding" - [2319] Map
  4. Handbook: House Liao, p. 17, "Capellan Confederation Founding - [2366] Map"
  5. Handbook: House Liao, p. 13, "Timeline: Capellan Zone 2367"
  6. Handbook: House Davion, p. 48, "Federated Suns After Age of War - [2571] Map"
  7. Handbook: House Kurita, p. 31, "Draconis Combine after Age of War - [2571] Map"
  8. Handbook: House Liao, p. 25, "Capellan Confederation after Age of War - [2571] Map"
  9. Historical: Reunification War, p. 159, "Inner Sphere - [2596] Map"
  10. Era Report: 2750, p. 37, "Inner Sphere - [2750] Map"
  11. Field Manual: SLDF, "Inner Sphere - [2764] Map"
  12. Historical: Liberation of Terra Volume 1, p. 11, "Inner Sphere - [2765] Map"
  13. 13.0 13.1 Historical: Liberation of Terra Volume 1, p. 138, "Operation LIBERATION Wave 1 [July 2772 - December 2774]"
  14. First Succession War (Source Book), p. 25, "Inner Sphere - [2786] Map"
  15. 15.0 15.1 First Succession War, p. 45, "Neglected Front: Liao Takes Advantage"
  16. Handbook: House Liao, p. 31, "Capellan Confederation after First Succession War - [2822] Map"
  17. Handbook: House Davion, p. 54, "Federated Suns After First Succession War - [2822] Map"
  18. 18.0 18.1 Handbook: House Kurita, p. 43, "Draconis Combine after First Succession War - [2822] Map"
  19. Historical: Liberation of Terra Volume 2, p. 122-123, "Inner Sphere - 2822"
  20. First Succession War (Source Book), p. 113, "Inner Sphere - [2822] Map"
  21. Handbook: House Davion, p. 60, "Federated Suns After Second Succession War [2864]"
  22. Handbook: House Liao, p. 39, "Capellan Confederation after Second Succession War - [2864] Map"
  23. House Davion (The Federated Suns), "Federated Suns - [3025] Map"
  24. Handbook: House Davion, p. 70, "Federated Suns after Third Succession War - [3025] Map"
  25. House Kurita (The Draconis Combine), "Draconis Combine Map - [3025]"
  26. Handbook: House Kurita, p. 64, "Draconis Combine after Third Succession War - [3025] Map"
  27. House Liao (The Capellan Confederation), "Capellan Confederation - 3025 Map"
  28. Handbook: House Liao, p. 40, "Capellan Confederation after Third Succession War - [3025] Map"
  29. Handbook: House Davion, p. 71, "Federated Suns after Fourth Succession War - [3030] Map"
  30. Handbook: House Kurita, p. 66, "Draconis Combine after Fourth Succession War - [3030] Map"
  31. Handbook: House Liao, p. 49, "Capellan Confederation after Fourth Succession War - [3030] Map"
  32. Historical: War of 3039, p. 133, "Inner Sphere - [3040] Map"
  33. Handbook: House Davion, p. 76, "Federated Suns after War of 3039 Map"
  34. Handbook: House Kurita, p. 68, "Draconis Combine after War of 3039 - [3040] Map"
  35. Era Report: 3052, p. 11, "Inner Sphere - [3050] Map"
  36. Era Report: 3052, p. 23, "Inner Sphere - [3052] Map"
  37. Handbook: House Kurita, p. 71, "Draconis Combine after Operation REVIVAL - [3052] Map"
  38. Era Report: 3062, p. 11, Inner Sphere - [3057] Map
  39. Handbook: House Davion, p. 78, "Federated Suns after Operation Guerrero - [3058] Map"
  40. Handbook: House Liao, p. 60, "Capellan Confederation after Operation Guerrero - [3058] Map"
  41. Era Report: 3062, p. 29, Inner Sphere - [3063] Map
  42. Handbook: House Davion, p. 82, "Federated Suns After FedCom Civil War - [3067] Map"
  43. Handbook: House Liao, p. 68, "Capellan Confederation after FedCom Civil War - [3067] Map"
  44. Handbook: House Kurita, p. 74, "Draconis Combine after FedCom Civil War - [3067] Map"
  45. Jihad: Final Reckoning, p. 42, "Inner Sphere - [October 3067] Map"
  46. Jihad Secrets: The Blake Documents, p. 65, "Inner Sphere - [3075] Map"
  47. Field Report: AFFS, p. 21, "Armed Forces of the Federated Suns Deployment Map - [August 3079]"
  48. Field Report: CCAF, p. 21, "Capellan Confederation Armed Forces Deployment Map - [August 3079]"
  49. Jihad: Final Reckoning, p. 63, "Inner Sphere Map - [March 3081]"
  50. Field Manual: 3085, p. vi, "Inner Sphere - October 3085"
  51. Map of the Inner Sphere 3130
  52. Era Report: 3145, p. 11, "Inner Sphere - [3135] Map"
  53. Era Report: 3145, p. 39, "Inner Sphere Map - [3145]"
  54. Field Manual: 3145, p. VI, "Inner Sphere - 3145"
  55. 55.0 55.1 First Succession War, p. 82, "Caught In The Capellan Crossfire"
  56. Jihad Hot Spots: Terra, p. 21, "Timeline of the Jihad"
  57. Jihad: Final Reckoning, p. 55, "The Jihad In Review"
  58. Jihad Hot Spots: Terra, p. 22, "Timeline of the Jihad"
  59. Jihad: Final Reckoning, p. 56, "The Jihad In Review"
  60. Field Manual: SLDF, p. 251, "SLDF - Terran Hegemony Military Command Map"
  61. 61.0 61.1 First Succession War (Source Book), p. 135, "First Succession War Deployment Table - CCAF"
  62. 62.0 62.1 Total Chaos, pp. 154-155 "SLUGGER’S PARADISE"
  63. Field Manual: 3085, p. 186, "RAF Deployment Table - 3085"
  64. Field Manual: 3145, p. 47, "Capellan Confederation Armed Forces Deployment Table - 3145"