138th BattleMech Division

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138th BattleMech Division
Unit Profile (as of 2764)
Nickname The Stonewall Jackson Division
Parent Formation XXI Corps
Formed unknown


The 138th BattleMech Division was a part of the Star League Defense Force Regular Army.


The Division was highly skilled in tactical defense. They would use their mechanized infantry to scout out the terrain of the world where they were assigned, and then set up on the best defensive terrain possible. Their opponents were forced to face the Stonewall Jackson Division on ground chosen by the SLDF unit. To maximize their capability, the 1383rd Brigade would frequently employ hit-and-run attacks on enemy forces.[1]

In 2764, the unit was assigned, as a part of the XXI Corps, First Army, to the Terran Military Region to garrison Dieron[2], and then transferred to District 1 of the Free Worlds League Military Region by 2765, to take part in the New Vandenberg Uprising.[3] The 138th was destroyed during the Hegemony Campaign.[3]


Rank Name Command
Commanding Officers of the 138th BattleMech Division
Major General John Peter Sullivan 2764[1]




The 138th employs its infantry as scouts to locate the best defensive terrain, from which it fights a defensive battle.[1]


As an SLDF BattleMech Division the 138th would have been composed with two Brigades of 'Mech regiments and one brigade of Mechanized Infantry regiments.[4]


  • 1381st Brigade [5][1]
  • 1382nd Brigade
  • 1383rd Brigade
  • 1389th Ground Aero Wing

Game Rules[edit]

The 138th Division is immune to Overrun Combat and Force the Initiative attacks.[6]


  1. 1.0 1.1 1.2 1.3 Field Manual: SLDF, p. 43, "138th Mechanized Infantry Division"
  2. Field Manual: SLDF, p. 251, "SLDF - Terran Hegemony Military Command Map"
  3. 3.0 3.1 The Star League, p. 140, "First"
  4. The Star League, p. 133
  5. Field Manual: SLDF, p. 13
  6. Field Manual: SLDF, p. 244