12th Dieron Regulars

Twelfth Dieron Regulars
Unit Profile (as of 3067)
Nickname Arm of Unswervable Power
Parent Formation Dieron Regulars
Formed Between 2765 and 2779[1][2]



The Twelfth Dieron Regulars were one of thirty-one regiments of Dieron Regulars to be created by the Draconis Combine Mustered Soldiery after 2765.[3] The Dieron Regulars expanded by ten regiments during the Amaris Civil War,[2] and a further twenty-one regiments were raised between the end of the Civil War and the end of the First Succession War. The Twelfth was one of the ten regiments created between 2765 and the end of the Civil War in 2779.[2] During General Kerensky's Exodus preparations, the Twelfth Dieron Regulars were deployed to Bob to counter any aggressive SLDF moves.[4]

3rd Succession War[edit]

In 3025 the unit was stationed on Ashio.[5]

4th Succession War[edit]

War of 3039[edit]

The Twelfth Dieron Regulars were deployed alongside a sister regiment, the Twenty-seventh Dieron Regulars, to recapture Athenry, in July 3039. The task force was notionally under the command of Sho-sho Yawatono Kurita, a member of the Kurita family, who was a less able field commander but well-regarded by his command as a lucky mascot. Athenry had been captured by two regiments from the Blue Star Irregulars mercenary command, the 1894th Light Horse and Twenty-first Rim Worlds, who had won grudging acceptance from the local population, but both regiments lacked experience of waging a defensive campaign, and instead preferred to operate as rapid-reaction forces rather than preparing and holding fortifications. The Irregulars aerospace fighters contested the invasion in space, scoring some successes - including disabling an Excalibur-class DropShip badly enough that it crashed in the Hoboken Sea, with relatively few casualties among the embarked personnel, but with most of the tanks aboard wrecked by water damage, along with the DropShip itself.[6]

The Regulars began their campaign by regrouping and reorganizing before launching attacks against isolated islands and island chains defended primarily by infantry forces. The Regulars had bought submarines and blue-water hydrofoils and quickly captured the Larsen Island Chain, although the Irregulars aerospace fighters gave the infantry support where they could, with some islands only being captured after a naval barrage had shattered the defensive positions and the infantry themselves had been defeated in grueling hand-to-hand battles. In September the Regulars began clearing the Wandessa and Zubeckis island chains, as well as beginning air operations against the main allied positions in the Espalars, and in particular against the troops on the Lisbon Heights.[6]

In October the Regulars began clashing with the Irregulars main elements, particularly the 1894th Light Horse, building up to a beachhead landing at Hauk Point that led to a two-week stalemate as the Regulars tried and failed to break out of their landing zone, before a second beachhead was established at Myne Down and forced the Irregulars to pull back to the Agilar Pass. The mercenaries held the pass in the face of a determined assault; in an attempt to break the deadlock the Regulars began making artillery strikes, which the Irregulars responded to with their own counter-battery strikes. The level and tempo of artillery strikes steadily increased until it was nicknamed "materialschlact" - a direct reference to the massive artillery barrages in the buildup to the Battle of the Somme in the twentieth century on Terra. The artillery duel turned the valley into a battered mess resembling a moonscape, and forced the Irregulars to slowly withdraw, with sporadic small-scale engagements being waged up until the Twenty-seventh finally pushed the last of the Irregulars forces contesting the valley from their redoubt in the ski resort of Kolos. The Dieron Regulars were faced with the battle for the capital, New Senna, but both the DCMS forces and the Irregulars were exhausted by three months of constant combat, and both knew that the battle for the city would be bloody and exact a high toll on the civilian population. The commanding officer of the Irregulars, General Alex Duff-Gordon, elected to negotiate a withdrawal in early December, and the Irregulars left Athenry on the 10th. The decision to abandon Athenry was generally unpopular with the LCAF High Command - albeit being supported by General Nondi Steiner - but it also kept the total casualty count for the invasion and counter attack to just six thousand fatalities in total.[6]

Clan Invasion[edit]

The Twelfth Dieron Regulars were stationed on Ashio immediately prior to Operation REVIVAL.

First Combine/Dominion War[edit]

The "new" Twelfth Dieron Regulars had to be reorganized in late 3062 after their time garrisoning the border world Kiesen was abruptly cut short by a retaliatory attack by Clan Ghost Bear early in the Combine-Ghost Bear War.

Federated Suns Incursion[edit]

After being receiving hasty upgrades the Twelfth went on to assist the 45th Dieron Regulars in defending Ashio from the 1st Robinson Rangers in late 3064.


In the confusion of the Jihad the Twelfth Dieron Regulars (along with the 22nd Dieron Regulars) suffered serious losses at the hands of Clan Diamond Shark on Nykvarn in the mid-3070's. Reduced to 40% of their nominal strength, they were transferred to Luzerne to rebuild.[7]


Rank Name Command
Commanding Officers of the 12th Dieron Regulars Regiment
Brigadier General Yawatono Kurita 3025[5]
Tai-sa Lancor Walton 3050[8]
Tai-sa Brian Quick 3054[9]
Tai-sa Katherine Stavrakos 3059 - November 3062[10]
Tai-sa Mark Isoguri November 3062 - 3067[10][11]


In 3025 the unit had no specialty.[12]

The use their light weight as an advantage against their enemy, because they can outmaneuver their opponent with ease. The unit also extensively uses their scouting capability.[9]

Composition History[edit]


Twelfth Dieron Regulars (Regiment/Green/Questionable)[3]

- At this point in time the Twelfth was a medium-weight regiment operating at full strength and was stationed on Ascella.[3]


Twelfth Dieron Regulars (Regiment/Green/Questionable)[3]

- At this point in time the Twelfth was a medium-weight regiment operating at just below sixty percent strength, and was stationed on Atria.[3]


12th Dieron Regulars (Regiment/Green/Questionable) [13]

Note: At this point in time the medium-weight unit was stationed on Atria with an operational readiness of 126 percent. [13]


12th Dieron Regulars (Regiment/Green/Questionable) [13]

Note: At this point in time the medium-weight unit was stationed on Kaus Borealis with an operational readiness of 93 percent. [13]


Twelfth Dieron Regulars (Regiment/Green/Reliable)[14]

Note: This was a medium Mech unit.[15]At this point in time the unit was stationed on Ashio. [5]


Twelfth Dieron Regulars (Regiment/Green/Questionable)[16]

Note: At this point in time the command was stationed on Ashio. [16]


Twelfth Dieron Regulars (Regiment/Green/Questionable)[8]

  • CO: Tai-sa Lacor Walton
Note: At this point in time the unit was stationed on Ashio.[8]


Twelfth Dieron Regulars (2 Battalions/Green/Reliable)[17]

  • CO: Tai-sa Brian Quick

Twelfth Dieron Regulars (Battalion/Regular/Reliable)[17]

  • CO: Tai-sa Lacor Walton


Twelfth Dieron Regulars (Regiment//Regular/Reliable)[9]

  • CO/First Battalion: Tai-sa Katherine Stavrakos
  • Second Battalion: Chu-sa George Daily
  • Third Battalion: Chu-sa Mark Isoguri

Note: The 'Mechs are upgrade with the time and some OmniMechs are also present.

Twelfth Dieron Regulars Aerospace (Expanded Wing/Regular/Reliable)[9]

  • Wing Commander: Sho-sa Delos Takagi

Note: Some clan fighters made its way in the ranks of the unit.

Kiesen Medium Lancers (Regiment/Green/Reliable)[9]

  • Armor Commander: Tai-sa Blane Hoover

Legacy of Minoru (Regiment/Regular/Fanatical)[9]

  • Troop Commander: Tai-sa Jerome Weber

Note: The unit is know for their tendency to fanaticism. Every trooper will attack a 'Mech with out question. The command contains some light artillery (2 squads) and infantry which is skilled in the use of demolitions.


Twelfth Dieron Regulars (Regiment/Regular/Reliable)[11]

  • CO/1st Battalion: Tai-sa Mark Isoguri

Twelfth Dieron Regulars Aerospace (Expanded Wing/Regular/Reliable)[11]

  • Wing Commander: Sho-sa Clarence Sandwalker

Kiesen Medium Lancers (Regiment/Green/Reliable)[11]

  • Armor Commander: Tai-sa Kato Loginov

Legacy of Minoru (Regiment/Regular/Fanatical)[11]

  • Troop Commander: Tai-sa Lawrence Hatfeld


  1. First Succession War, p. 32, "Those Left Behind"
  2. 2.0 2.1 2.2 First Succession War, p. 119, "House Kurita"
  3. 3.0 3.1 3.2 3.3 3.4 First Succession War, p. 137, "Draconis Combine Mustered Soldiery (DCMS)"
  4. Touring the Stars: Bob, p. 5
  5. 5.0 5.1 5.2 House Kurita (The Draconis Combine), p.133
  6. 6.0 6.1 6.2 Historical: War of 3039, p. 79-80, "Athenry (July-December)"
  7. Field Report: DCMS, p. 9
  8. 8.0 8.1 8.2 20 Year Update, p. 40, "DCMS Deployment Table - 3050"
  9. 9.0 9.1 9.2 9.3 9.4 9.5 Field Manual: Draconis Combine, p. 52, "12th Dieron Regulars Unit Profile"
  10. 10.0 10.1 Hikagemono, p. 14
  11. 11.0 11.1 11.2 11.3 11.4 Field Manual: Updates, p. 116, "DCMS Deployment Table - 3067"
  12. House Kurita (The Draconis Combine), p. 142 "The Dieron Regulars"
  13. 13.0 13.1 13.2 13.3 ’’ Second Succession War’’, p. 97
  14. House Kurita (The Draconis Combine), p. 135, "Deployment Table - 3025"
  15. House Kurita (The Draconis Combine), p.144
  16. 16.0 16.1 Historical: War of 3039, p. 138 >Historical: War of 3039, p. 138
  17. 17.0 17.1 Objective Raids, p.27