21st Royal BattleMech Division

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21st Royal BattleMech Division
Formed unknown
Nickname The Antaeus Division[1]
Affiliation SLDF
Parent Command XXXIX Corps


The Twenty-first Royal BattleMech Division was a part of the Star League Defense Force Regular Army. It was one of the SLDF's Royal units, which consisted of troops from the Terran Hegemony.


In 2764, the unit was assigned, as a part of the XXXIX Corps, Tenth Army, to District 3 of the Free Worlds League Military Region, but was moved to an undisclosed area of the Periphery.[2] The Twenty-first was destroyed during the Hegemony Campaign.[2]


Rank Name Command
Commanding Officers of the 21st Royal BattleMech Division
Major General Elidia Krassow 2764[1]




As an SLDF BattleMech Division the Twenty-first would have been composed with two Brigades of 'Mech regiments and one brigade of Mechanized Infantry regiments.[3]


Brigades of the 21st Division - 2764[4]
Rank Name Brigade
211th Royal BattleMech Brigade
212th Royal BattleMech Brigade
213th Royal Mechanized Infantry Brigade


  1. 1.0 1.1 Field Manual SLDF, page 133
  2. 2.0 2.1 The Star League, p. 143, "Tenth"
  3. The Star League, p. 133
  4. Field Manual: SLDF, p. 13