3rd Dieron Regulars

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3rd Dieron Regulars BattleMech Regiment
Unit Profile (as of 3145)
Nickname The Ever-Vigilant
Parent Formation Dieron Regulars
Formed unknown



The 3rd Dieron Regulars were formed at some point prior to 2581.[1]

Reunification War[edit]

The 3rd Dieron Regulars were active during the Reunification War, acting as one of several DCMS BattleMech regiments assigned to an ad-hoc corps in support of the Star League Defense Force task force responsible for invading the Outworlds Alliance. This invasion, named Operation UNION HOLD, saw the 3rd Dieron Regulars tasked with occupying several Alliance worlds as garrison forces and pacifying any resistance on these worlds, replacing Star League Defense Force garrisons.[1]

Responsible for providing a garrison for the world of Bad News and support for various regiments of the Galedon Regulars attacking Kazanka, Nexus Ri and Zlatousi, the 3rd Dieron Regulars garrison on Bad News would be subject to a heavy attack from the 2nd Pitcairn Legion in 2583. The 3rd Dieron Regulars forces on Bad News at the time consisted of a single battalion of BattleMechs, supported by two regiments of infantry and two more of armor, whereas the 2nd Pitcairn Legion was a full BattleMech regiment; the Pitcairn Legion spent three weeks attacking the 3rd Dieron Regulars and their supporting forces, almost destroying the complete battalion. Despite this, the 3rd Dieron Regulars were able to hold Bad News for the Combine.[2][3]

First Succession War[edit]

Just prior to the war the unit was stationed on Junction.[4]

Third Succession War[edit]

In late 3021 the Third suffered severe casualties assisting in the defense of the Kurita world of Dromini VI against large scale operations by the Wolf's Dragoons mercenary unit's Epsilon Regiment in the employ of House Steiner[5].

Fourth Succession War[edit]

During the 4th Succession War, the Third Dieron raided the world of Lyons. On orders to wipe out the settlement of New Freedom. [6] On May, 5th, 3029 the regiment attacked the city, and over the course of two days slaughtered the population. On the 17th, the Kell Hounds mercenary unit arrived and conducted a sneak attack against the Regulars. The Kell Hounds' 1st Battalion overran the Third's Command HQ, killing the regiment's commander. After realizing that the unit was cut off from its DropShips, the 3rd in command Tai-sa Hiro Akuto surrendered. [7]

Ronin Wars[edit]

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War of 3039[edit]

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Clan Invasion[edit]

At the start of 3050, the Third was stationed on Konstance[8] Early in the Clan Invasion, the DCMS moved many regiments from their garrison positions to the Clan front, thus leaving many important worlds without protection. The Third were split in two, 1st and 2nd Battalions moving to guard Dieron while the 3rd Battalion guards the world Altair. [9]

Operation Bulldog[edit]

The Third maintained its positions on Dieron and Altair, these worlds being too strategically important to the Combine to leave unguarded, and no other units being available to take the position.

Dominion War[edit]

The command was tasked with the important defense of Dieron and Altair. Both are planets with important military value. As neither world was attacked, they saw no combat.

Federated Suns Incursion[edit]

After the redeployement of the Eridani Light Horse command to Dieron, the Third could share the burden to defend this planet with another unit.


The Third Dieron Regulars were on Dieron when the Word of Blake launched an invasion of the system on the 4th of February 3068.[10] After destroying the Dragon's Roost via orbital bombardment[11] and launching several attacks against the Third at various remove mining sites that were largely unsuccessful,[12] the Blakists initially concentrated on destroying the Eridani Light Horse at Fort Winston, a part of the Fortress Dieron complex built into Mount Shanyu. The Blakists used multiple tactical nuclear strikes delivered by DropShips against Fortress Dieron to target the Horsemen,[13] although incidental casualties included the city of Aldinga, a major industrial site, which was destroyed when shelling from one Blakist WarShip intended for Fortress Dieron struck a nearby faultline that carved in the entire valley that the city had been nestled in, deep in the heart of Mataeo.[14] Whilst the Eridani Light Horse fought until the surviving Horsemen had been captured, the Blakists subsequently turned those same DropShips on the Third, obliterating much of the regiment.[13]

Hohiro Kurita, the son of the Coordinator, led a task force to try and liberate Dieron on the 16th of April 3068, but was captured in mid-June and initially reported as being missing, presumed dead.[10] The Tenth Ghost had managed to sneak onto Dieron in March, and managed to fortify near Deber City and secure the Iznakki Spaceport, but were eventually ordered to retreat by the Dieron High Command after a furious and intense battle with the mercenary unit Burr's Black Cobras that raged over twenty-six days and claimed the lives of many in both units, including Colonel Richard Burr and Tai-sa Samuel Noda of the Tenth Ghost.[13][15]

Despite two months of hideous losses at the hands of the invading Blakists, the Third attempted to continue to fight, but almost all of the regiment's fixed positions has been destroyed or overwhelmed by March 3069. The attack made by the Tenth Ghost managed to buy the Third a little time, but the bulk of the survivors surrendered after the unit headquarters was overrun by Blakist forces in the Chiloe. Although some survivors scattered, a number were captured by the Blakists and interned in prison camps.[15] The last elements of the Third attempted to survive by raiding ancient SLDF depots in locations like the Atacama Desert, looking to rearm and repair with whatever they could find[16] and hoping to establish a string of firebases, emboldened by Hohiro Kurita's successful escape[17][18] in January 3069[18] with the surviving elements of the Ghosts of the Black Watch.[19] Although the survivors managed to successfully locate a couple of former depots using old survey logs, they found little to help them; when the last ranking officer in the Third[16] - Tai-sa Hyogo[17] - surrendered to Blakist forces at Tibet City[17][16] in 3071[17], the Third effectively ceased to exist.[16]

Following the destruction of the Third, some of the few survivors went on to band together with remnants of other destroyed DCMS commands such as the Ryuken-go and the 16th Legion of Vega to form the mercenary unit known as the Kouki no Otakebi.[20]

Dark Age Era[edit]

Reformed when the Dieron Military District was officially reborn in 3135. The Third has been part of the push into Federated Suns, experiencing hard combat. Currently posted in Errai, giving it a chance to recover after it had lost a little less then half it's strength due to a loss of a Jumpship simply disappearing. [21]


In 3145 the commanding officer is Tai-sa Lynwood Rich.[25]


The unit specializes in Urban Combat.[26]

Composition History[edit]


5th Dieron Regulars (Regiment/Veteran/Reliable)[4]


3rd Dieron Regulars (Regiment/Regular/Reliable)[27]

Note:The command contains mainly medium machines. [26]


3rd Dieron Regulars (Regular/Reliable)[28]


3rd Dieron Regulars (Regiment/Regular/Reliable)[8]

  • CO: Sho-sho Samson Torsibo


3rd Dieron Regulars (Regiment/Regular/Reliable)[29]

  • CO: Sho-sho Samson Torsibo


3rd Dieron Regulars (Regiment/Regular/Reliable)[23]

  • XO: Chu-sa Alexander Carrington
  • 2nd Battalion: Chu-sa Jean-Michael Bouchier
  • 3rd Battalion: Chu-sa Matthew Lodo
Note: The unit received only 12 OmniMechs, because of its defensive deployment and low priority for supplies.

3rd Dieron Regulars Aerospace (2 Companies/Regular/Reliable)[23]

  • Wing Commander: Sho-sa Koshiki Anderson
Note: The command is divided, because they must provide air defense for two planets. Should the need arise the ranks can build up to wing level on each world through the assigment of militia fighters.

Dieron Red Brigade (Regiment/Green/Reliable)[23]
255th District Armored (Regiment/Green/Reliable)

  • Armor Commander: Tai-sa Constantine Kohrani
Note: Like the fighter group, the two units provide support for the 'Mech forces on both planets and are only attached temporarily.

7th Dieron Protectors (Regiment/Green/Reliable)[23]
21st Altair Defense Force (Regiment/Green/Reliable)

  • Troop Commander: Tai-sa Yeho Nashamori
Note: These to milita are only are attached should an invasion occur.


3rd Dieron Regulars (2 Battalion/Regular/Reliable)

  • CO: Tai-sa Gerrald Hyogo
Note: Clan technology: 20 percent | Advanced IS technology: 67 percent | Omnis: 20 percent [30]

3rd Dieron Aerospace (Air Company/Regular/Reliable)[30]

  • CO: Sho-sa Koshiki Anderson
Note: Clan technology: 5 percent | Advanced IS technology: 45 percent | Omnis: 10 percent

Dieron Red Brigade (Regiment/Green/Reliable)[30]

  • CO: Tai-sa Constantine Kohrani
Note: Advanced IS technology: 25 percent

7th Dieron Protectors (Regiment/Green/Reliable)[30]

  • CO: Tai-sa Yeho Nashamori

Altair Garrison
3rd Dieron Regulars (Battalion/Regular/Reliable)[30]

  • CO: Chu-sa Matthew Lodo
Note: Clan technology: 15 percent | Advanced IS technology: 65 percent | Omnis: 15 percent

3rd Dieron Aerospace (Air Company/Regular/Reliable)[30]

  • CO: Chu-i Ezekiel Nagumo
Note: Advanced IS technology: 55 percent | Omnis: 5 percent

255th District Armored (Regiment/Green/Reliable)[30]

  • CO: Tai-i Reginald Berkley
Note: Advanced IS technology: 20 percent

21st Altair Defense Force (Regiment/Regular/Reliable)[30]

  • CO: Tai-sa Kendal Akeley


3rd Dieron Regulars (Veteran/Questionable)[25]

  • CO: Tai-sa Lynwood Rich

3rd Dieron Aerospace (Wing/Veteran/Reliable)[25]

  • CO: Tai-sa Shigetoki Deushi

27th Dieron Heavy Armor (Regular/Reliable)[25]

  • CO: Tai-sa Lynwood Rich

73rd Dieron Infantry (Veteran/Fanatical)[25]

  • CO: Tai-sa Norberto Rocha



Reunification War[edit]

  • Forces from the 3rd Dieron Regulars have a 50% chance of each MechWarrior, pilot or vehicle crew receiving a +1 bonus to the Random Experience Level roll when unit experience levels are generated.[31]
  • Each lance from the 3rd Dieron Regulars has a 25% chance of having the maximum amount of Advanced Components allowed for that lance being double the normal allowance.[31]


  1. 1.0 1.1 Historical: Reunification War, p. 141, "Outworlds Alliance Front"
  2. Historical: Reunification War, p. 121, "Kazanka, Nexus Ri and Zlatousi"
  3. Historical: Reunification War, p. 123, "Pitcairn's Raids"
  4. 4.0 4.1 Field Report 2765: DCMS, p. 11
  5. Wolf's Dragoons (sourcebook), p. 27
  6. Warrior: Coupé page 104 - Morgan Kell tells his people that ISF reports that the people of New Freedom's goal was to assassinate the Coordinators. The Third Dieron was sent in to annihilate them.
  7. Warrior: Coupé, p. 103 - "Debriefing of the Kell Hounds after the battle of New Freedom".
  8. 8.0 8.1 8.2 20 Year Update p. 40
  9. Objective Raids pp. 25
  10. 10.0 10.1 Jihad: Final Reckoning, p. 45, "The Jihad In Review"
  11. Jihad Turning Points: Dieron, p. 5, "Dieron"
  12. Jihad Turning Points: Dieron, p. 10, "Deadly Rain"
  13. 13.0 13.1 13.2 Jihad Turning Points: Dieron, p. 6, "Combatants"
  14. Dark Age Republic Worlds, p. 237, "Dieron"
  15. 15.0 15.1 Jihad Turning Points: Dieron, p. 9, "Combatants"
  16. 16.0 16.1 16.2 16.3 Jihad Turning Points: Dieron, p. 13, "Serpents in Stone"
  17. 17.0 17.1 17.2 17.3 Total Chaos, p. 57, "Dieron (sidebar)"
  18. 18.0 18.1 Jihad: Final Reckoning, p. 46, "The Jihad In Review"
  19. Jihad Turning Points: Dieron, p. 7, "Combatants"
  20. Field Report: DCMS, p. 20, "Mercenaries"
  21. Field Manual: 3145, p. 53, "Third Dieron Regulars"
  22. "The Kell Hounds", p 51
  23. 23.0 23.1 23.2 23.3 23.4 Field Manual: Draconis Combine, p. 50, "Unit Profile"
  24. Jihad Turning Points: Dieron, p. 8 - "3rd Dieron Regulars"
  25. 25.0 25.1 25.2 25.3 25.4 Field Manual: 3145, p. 64, "DCMS Deployment Table - 3145"
  26. 26.0 26.1 House Kurita (The Draconis Combine), p.144
  27. House Kurita (The Draconis Combine), p. 135
  28. Historical: War of 3039 , p. 138
  29. Objective Raids, p.25
  30. 30.0 30.1 30.2 30.3 30.4 30.5 30.6 30.7 Field Manual: Updates p.117
  31. 31.0 31.1 Historical: Reunification War, p. 182, "Dieron Regulars"