18th Infantry Division

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18th Infantry Division
Unit Profile (as of 2784)
Nickname N/A
Parent Formation LXVII Corps
Formed unknown


The Eighteenth Infantry Division was a part of the Star League Defense Force Regular Army.[1]


The Eighteenth formed a part of LXVII Corps, Twentieth Army, and in 2764 was stationed at an undisclosed location within the Rim Worlds Republic Territorial State.[1]

After surviving the Periphery uprising in 2765 the Eighteenth went on to fight during the Hegemony Campaign. During the assault on Alula Australis in December 2775 the Division overran several AEAF outposts and captured the Mount Castarn Castle Brian in less than a weeks fighting, capturing both the garrison commander and planetary governor.[2]

The Division sustained heavy casualties on Alula Australis from WMD attacks; as a result, the Eighteenth as a division had been disbanded by 2779, although some surviving elements of the division joined the Draconis Combine and Lyran Commonwealth.[1] Those personnel from the Eighteenth who joined the Lyran Commonwealth Armed Forces were used to reactivate the Eighteenth Lyran Guards in 2782.[3]


As an SLDF infantry division the Eighteenth would have been formed from one brigade of light BattleMech regiments and two brigades of grunt infantry.[4]


  1. 1.0 1.1 1.2 The Star League, p. 158, "Twentieth Army"
  2. Historical: Liberation of Terra Volume 2, p. 46
  3. First Succession War, p. 33, "Those Left Behind (Continued)"
  4. The Star League, p. 133