151st Royal BattleMech Division

151st Royal BattleMech Division
Nickname The Ulysses S. Grant Division
Affiliation Star League
Parent Command XII Corps


The 151st 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 XII Corps, Ninth Army, to District 2 of the Free Worlds League Military Region, but was moved to an undisclosed area of the Periphery.[1]

The 151st participated in the Canopian campaign, and during the assault on Terra, they lost nearly a third of their troops. They fought in India and Mexico.[2] The 151st took New Delhi from Amaris' forces.[3] They also landed in Veracruz, South America, and assisted the 245th BattleMech Division in destroying several SDS batteries.[4] After the assault on Terra concluded, the 151st was based in Buenos Aires on the South American continent.[5]


Their commanding officer, Lauren Hayes, was a staunch critic of the exodus plan saying it was abandoning the ideals of the Star League. Due to this, Aleksandr Kerensky made a compromise with Jerome Blake that the 151st would become the military arm of ComStar.[1][6][2][7] Despite the fate of the 151st being regarded as unknown for several centuries after the fall of the Star League,[1] subsequent publications released in the thirty-first and thirty-second centuries revealed that the 151st almost certainly formed the basis of the "mercenaries" used to create the First ComStar Expeditionary Division in 2784.[8] Following Operation SILVER SHIELD in June 2788, in which ComStar's Expeditionary Divisions seized control of Terra, the vast majority of the Expeditionary Divisions were demobilized and their equipment cached for the future, forming the basis of the later Com Guards.[9]


Rank Name Command
Commanding Officers of the 151st Royal BattleMech Division
Major-General Sau Trappendorf 2764 - 2776[6]
Major-General Lauren Hayes 2776[6][2]




As an SLDF BattleMech Division the 151st would have been composed with two Brigades of 'Mech regiments and one brigade of Mechanized Infantry regiments.[10]


  • 1511th Royal BattleMech Brigade [11]
  • 1512th Royal BattleMech Brigade
  • 1513th Royal Infantry Brigade


  1. 1.0 1.1 1.2 The Star League, p. 142, "Ninth"
  2. 2.0 2.1 2.2 2.3 Historical: Liberation of Terra Volume 2, p. 17
  3. Historical: Liberation of Terra Volume 2, p. 86
  4. Historical: Liberation of Terra Volume 2, p. 99
  5. Historical: Liberation of Terra Volume 2, p. 17 "Lauren Hayes profile"
  6. 6.0 6.1 6.2 ComStar (sourcebook), p. 013
  7. Historical: Liberation of Terra Volume 2, p. 17-18 "Lauren Hayes profile"
  8. First Succession War, p. 34, "Those Left Behind (Continued)"
  9. Historical: Liberation of Terra Volume 2, p. 117, "ComStar and the Com Guard"
  10. The Star League, p. 133
  11. Field Manual: SLDF, p. 13