5th Dieron Regulars

Dieron Regulars 2765.png
Fifth Dieron Regulars
Affiliation Draconis Combine
Parent Command Dieron Regulars

The Fifth Dieron Regulars was a twenty-eighth century Draconis Combine BattleMech regiment.[1]



The Fifth Dieron Regulars can claim a heritage that goes back to the Alliance of Galedon and an equally ancient proto-state: the Dieron Federation. One of many twenty-fourth century proto-states in the region of space that in later centuries became known as the Draconis Combine, the Dieron Federation was persuaded to become a part of the Alliance of Galedon in 2310 by Shiro Kurita. As a part of the Alliance, the worlds of the Dieron Federation were required to provide a tithe of people from their population to New Samarkand for military training and indoctrination, with the first draft consisting of some three thousand men and women.[1]

The Alliance's control over the Dieron Federation fluctuated in the early years, as many became aware that they had been duped by Shiro Kurita, and Shiro was required to put down rebellions on a number of worlds, something that he was quite willing to do, invading those systems that attempted to secede and executing their planetary leaders. Dieron broke free in 2316 when the newly-appointed Director-General of the Terran Hegemony began expanding Terran influence once more; enticed by the combination of gentle diplomacy and implicit military threat, Dieron joined the Hegemony, a foe that Shiro was unable to oppose through military strength at the time. Undaunted, Shiro laid the groundwork for reclaiming Dieron by keeping the services of the brigade of Dieron natives who remained steadfastly loyal to House Kurita in his armed forces and retaining the name of the Dieron Regulars as part of the implicit promise that Dieron would once again be a part of the Kuritan state.[1]

Active during the Star League era, five regiments of Dieron Regulars - including the Fifth - occupied a privileged place within the Draconis Combine Mustered Soldiery. Portrayed in the Combine media as "exiles waiting for the change to go home", the Dieron Regulars spent their time divided between postings in the Benjamin Military District, moving back and forth between worlds in the interior of the District and worlds on the border with the Hegemony. Recruitment into the Dieron Regulars was weighted, with first priority given to Sun Zhang MechWarrior Academy or Dieron Warriors' Academy graduates descended from members of the original Dieron draft, second priority to other personnel who could claim a lineage back to that same draft, third priority to those recruited from worlds close to Dieron and finally those recruited from other worlds within the Benjamin Military District. As of 2765 all of the 'Mech regimental commanders within the Dieron Regulars were both Sun Zhang graduates and descendants of the Dieron draft. As with the other Dieron Regiments, the Fifth Dieron Regulars was the centerpiece of a brigade consisting of a 'Mech regiment, three medium armor regiments, three infantry regiments and up to four independent artillery regiments.[1]

First Succession War[edit]

Just prior to the war the unit was stationed on Biham.[1]

Invasion of Towne[edit]

In December of 2785, the 5th Dieron Regulars led a task force of seven infantry and Aerospace regiments which mounted invasion of recently claimed Terran Hegemony world of Towne. The planet was garrisoned by the 56th Avalon Hussars and it was supported by the 123rd Aero Interceptor Wing. The Regulars' invasion slowly overwhelmed the Davion forces, whom were inter-service rivals didn't quite coordinate their efforts to repulse the invasion. Davions had pleaded for assistance as Regulars overwhelmed them, but bureaucracy FedSuns delayed reinforcements long enough for Regulars and its support forces to conquer the planet for the Draconis Combine. The conquest became known as "The Towne Debacle", and triggered a re-organization of House Davion's military.[2]

Second Succession War[edit]

On the 2nd of August 2834 the DCMS launched Operation MOONLIGHT SONATA, a large-scale offensive against the Federated Suns. Attacks were launched against a series of worlds, with Listowel invaded by the Fifth Dieron Regulars in March 2835, facing the defending Forty-first Avalon Hussars. The two commands launched a dangerous series of attacks and counter-attacks against each other throughout the Duchesne Mountains, until an ambush at Drakman Peak turned the tables in favor of the Hussars, letting them play the cat to the Regulars' mouse. In late July, the Regulars withdrew, leaving Listowel to the Hussars. Drakman Peak was subsequently renamed Deliverance Peak.[3]


Rank Name Command
Commanding Officers of the 5th Dieron Regulars


During the Star League era the Dieron Regulars battalions were frequently guests of the various planetary governors of worlds close to the border between the Hegemony and the Combine, and all of the senior staff were thoroughly trained in both diplomacy and protocol.[1]


During the Star League era the Fifth was considered to be a well-trained military force, but the Fifth's command staff had a tendency to waste their infantry and armor forces on feints or security missions.[1]

Composition History[edit]


  • Fifth Dieron Regulars (Regiment/Veteran/Fanatical)[1]
  • BattleMech regiment
  • Three medium armor regiments
  • Three infantry regiments
  • Up to four independent artillery regiments
Note: At this point in time the Regulars were stationed on Biham.[1]


  • Fifth Dieron Regulars (Regiment/Veteran/Fanatical)[4]
- At this point in time the Fifth was a medium-weight regiment operating at full strength and was stationed on Biham.[4]


  • Fifth Dieron Regulars (Regiment/Veteran/Fanatical)[4]
- At this point in time the Fifth was a medium-weight regiment and had been reduced to just barely more than a third of full strength. The Fifth was stationed on Proserpina.[4]


5th Dieron Regulars (Regiment/Elite/Fanatical) [5]

Note: At this point in time the medium-weight unit was stationed on Al Na'ir with an operational readiness of 74 percent. [5] The unit was destroyed during the war.[5]


  1. 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Field Report 2765: DCMS, p. 11
  2. House Davion (The Federated Suns), p. 60 "The Towne Debacle" - The 5th Dieron Regulars and support forces conquer Towne in 2785.
  3. Second Succession War, p. 44, "In the Manner of a Fantasy"
  4. 4.0 4.1 4.2 4.3 First Succession War, p. 137, "Draconis Combine Mustered Soldiery (DCMS)"
  5. 5.0 5.1 5.2 ’’ Second Succession War’’, p. 97