(References to Gacrux)
Gacrux neighbouring systems
Note: X and Y are coordinates (light years on XY plane) relative to Terra at (0, 0)
| Jump point
|Moons||2 (Marcera & Worsca)|
|Atmospheric pressure||Standard (Breathable)|
|Highest native life||Plants|
|Ruler|| Georgio Quentin (Governor)|
Yitzahk Faquir (Planetary Legate)
- 2271 - Inhabited world 
- 2340 - Federation of Skye 
- 2341 - Lyran Commonwealth 
- 2571 - Lyran Commonwealth 
- 2596 - Lyran Commonwealth 
- 2750 - Lyran Commonwealth 
- 2765 - Lyran Commonwealth 
- 2822 - Lyran Commonwealth 
- 2864 - Lyran Commonwealth 
- 3025 - Lyran Commonwealth 
- 3030 - Lyran Commonwealth 
- 3040 - Federated Commonwealth 
- 3050 - Federated Commonwealth 
- 3052 - Federated Commonwealth 
- 3057 - Lyran Alliance 
- 3063 - Lyran Alliance 
- 3067 - Lyran Alliance 
- 3075 - Word of Blake Protectorate 
- 3076 - Word of Blake Protectorate 
- 3081 - Republic of the Sphere 
- 3085 - Republic of the Sphere 
- 3130 - Republic of the Sphere 
- 3135 - Independent world 
- 3145 - Wolf Empire 
- Gacrux FTM
- - At this point in time, the VIII Principes was at 65% of full strength, with 86% of their equipment featuring upgraded technology.
Gacrux is a world well on its way to extinction. Its sun is a red dwarf in the final stages of its life. The only reason the world was settled at all was to extract the radioactive materials needed for fusion engines and precious metals. Given its proximity to the Free Worlds League the citizens of Gacrux have always been supportive of House Steiner and the LCAF. In fact Gacrux is one of the few worlds in the Federation of Skye that didn't agitate for secession. On the other hand, this loyalty to House Steiner has become a hindrance in several situations. Gacrux was one of the most vocal opponents of the alliance with the Federated Suns, and the Brotherhood of Cincinnatus, a Lyran nationalist movement with ties to terrorism, has maintained a facility on the world for many years.
During the Jihad Gacrux was attacked by forces loyal to the Free Worlds League. These FWLM units were tricked into attacking the world after Word of Blake forces struck them under false colors. This attack led to Gacrux's defenders being hopelessly outnumbered when the Word of Blake arrived later and offered Gacrux a place in the Word of Blake Protectorate.
Gacrux was the second world to be targeted by the Lyran front of Operation SCOUR in late January 3077; troops under the command of Duke Robert Kelswa-Steiner liberated the nearby world of Cor Caroli in a week before attacking Gacrux. Attacked by Group III, the attack on Gacrux nearly stalled when the commanding officers of the 6th Benjamin Regulars, 1st Federated Suns Lancers and 31st Marik Militia were all killed in a targeted strike by the Word of Blake intended to remove the command organization of Group III. This left Leutnant-General Thomas Hogarth in charge of Group III, and under Hogarth the Group liberated Gacrux by May, although Hogarth was reticent to confirm details of how or what the next objective for Group III would be when interviewed later by the press.
The Dark Age
In 3104 the leadership of the shadowy organization known as the Brotherhood of Cincinnatus was destroyed on Gacrux. The Brotherhood's leadership had been targeted by a sustained military campaign conducted by the LCAF at the orders of Archon Adam Steiner following a failed attempt to assassinate Hanse Steiner, the mentally handicapped son of Peter Steiner-Davion and Marie Hussfield, in 3098. Adam led the First Royal Guards and Fourteenth Lyran Guards personally on Gacrux, having received permission from Devlin Stone to cross the border of the Republic of the Sphere in pursuit of the Brotherhood.
- Dark Age: Republic Worlds (3130), p. 182, "Gacrux World Profile"
- Handbook: House Marik, p. 16, "Free Worlds League Founding "
- Handbook: House Steiner, p. 13, "Federation of Skye world within the Lyran Commonwealth befor  and after at their founding in "
- Handbook: House Steiner, p. 25, "Lyran Commonwealth after Age of War "
- Historical: Reunification War, p. 159, "Inner Sphere Map "
- Era Report: 2750, p. 37, "Inner Sphere - 2750"
- Historical: Liberation of Terra Volume 1, p. 11, "Inner Sphere - 2765"
- Handbook: House Steiner, p. 36, "Lyran Commonwealth after First Succession War "
- Handbook: House Steiner, p. 40, "Lyran Commonwealth after Second Succession War "
- Handbook: House Steiner, p. 47, "Lyran Commonwealth after Third Succession War "
- Handbook: House Steiner, p. 56, "Lyran Commonwealth after Fourth Succession War "
- Handbook: House Steiner, p. 59, "Lyran Commonwealth after War of 39 "
- Historical: War of 3039, p. 133, "Inner Sphere - 3040"
- Era Report: 3052, p. 11, "Inner Sphere - 3050"
- Handbook: House Steiner, p. 61, "Lyran Commonwealth after Clan Invasion "
- Era Report: 3052, p. 23, "Inner Sphere - 3052"
- Era Report: 3062, p. 12, "Inner Sphere Map "
- Era Report: 3062, p. 29, "Inner Sphere Map "
- Field Manual: Updates, p. 177, "Lyran Alliance Deploment Table"
- Jihad Secrets: The Blake Documents, p. 63, "Inner Sphere - 3075"
- Jihad: Final Reckoning, p. 56, "The Jihad In Review"
- Jihad: Final Reckoning, p. 64, "Inner Sphere Map - [March 3081]"
- Field Manual: 3085, p. vii, "Inner Sphere Map - [October 3085]"
- Map of the Inner Sphere 3130
- Era Report: 3145, p. 10, "Inner Sphere - 3135"
- Era Report: 3145, p. 39, "Inner Sphere - 3145"
- Shattered Sphere, p. 48, "Lyran Alliance Deployment Table"
- Field Manual: 3085, p. 187, "RAF Deployment Table - 3085"
- Field Manual: 3145, p. 170, "Clan Force Deployments - Wolf Empire"
- Jihad Hot Spots: Terra, p. 27, "We Have Met The Enemy"
- Field Manual: 3145, p. 119, "Reconstruction"
- Dark Age: Republic Worlds (3130)
- Era Report: 2750
- Era Report: 3052
- Era Report: 3062
- Era Report: 3145
- Field Manual: 3085
- Field Manual: 3145
- Field Manual: Updates
- Handbook: House Marik
- Handbook: House Steiner
- Historical: Liberation of Terra Volume 1
- Historical: Reunification War
- Historical: War of 3039
- House Kurita (The Draconis Combine)
- Jihad: Final Reckoning
- Jihad Secrets: The Blake Documents
- Jihad Hot Spots: Terra
- Map of the Inner Sphere 3130
- Shattered Sphere