Fourth Quadrant rebellion

The Fourth Quadrant rebellion was a series of wars and rebellions that engulfed a quarter of Segmentum Solar. The exact dates are not known, but it definitely took place between 775.M41 and 780.M41. The individual conflicts had no single cause, rather countless grievances fostered over centuries of brutality and misrule by corrupt Imperial commanders. Opportunistic Chaos cults,, renegades and Xenos took advantage of the anarchy and over a dozen Space Marine Chapters were involved in the fighting.^{1-pp.57, 100}

History

Fortress of Kaligar

The Dark Angels Chapter was one of four that played the most significant role in crushing the rebellion, deploying in full Chapter strength.^1-p.100 Sammael, Master of the Ravenwing assaulted the Fortress of Kaligar and dueled the eponymous traitor for a full day and night before running him into the ground. Kaligar transpired to be a member of the Fallen.^2-p.44

Storm Marches

The Storm Marches were an area of the Fourth Quadrant dominated by Khorne-worshipping drift pirates. The Raptors Chapter fought in this region during the rebellion.^1-p.100

Sulsalid Campaign - 775-777.M41

The Sulsalid Campaign was prosecuted by the Raptors Chapter in conjunction with elite squadrons of Battlefleet Solar. During the rebellion the worlds of the Sulsalid Sub-sector had deposed their rightful rulers in favour of heretical ideals of 'progress' and 'democracy'. Determined to stop the spread of treachery the Adeptus Terra ordered the swift destruction of the rebellion.^1-p.100

The Raptors took command of retreating Imperial Guard forces and used them as cover to launch their own strikes on the enemy control and supply structure. Before long the power-distribution network of the sub-sector's capital world Auranar was severed in a dozen locations. The rebels retreated before the Imperial Guard's mass assault and Assault Squads and Thunderhawks of the Raptors slew the Sulsalid Ordinators in their sky-palaces, efficiently ending the rebellion.^1-pp.100-101

Lycanthros Drift Campaign - 780.M41

In the closing stages of the rebellion one of the last remaining rebel strongholds was situated in the Lycanthros System, to the galactic south of the Maelstrom Zone. The Astral Claws Chapter Master Lugft Huron was elected battle leader of a force comprising Space Marines from his own Chapter, the Fire Hawks, the White Scars and the Celestial Guard, as well as Krieg and Cal-Sec Imperial Guard and the Titans of Legio Venator.^{1-pp.57, 59}

Under Huron's leadership the system was purged in under a year. Huron himself lead the assault on the 'widowmaker' bastion gate on Lycanthros Secundus - an almost indestructible fortress garrisoned by the Bleak Brotherhood Chaos Space Marines.^1-p.59

Imperial Order of Battle

Space Marine Chapters

• Astral Claws^1-p.57
• Celestial Guard^1-p.59
• Dark Angels (Chapter Strength)^1-p.100
• Fire Hawks^1-p.57
• Raptors (Chapter Strength)^1-p.100
• Red Wolves (Chapter Strength)^1-p.100
• Skull Bearers (Chapter Strength)^1-p.100
• White Scars^1-p.59

Imperial Guard

• Col-Sec^1-p.59
• Death Korps of Krieg^1-p.59

Imperial Navy

• Elite Battlefleet Solar squadrons^1-p.100

Titan Legios

• Legio Venator^1-p.59

Rebel Order of Battle

Chaos Space Marines

• Bleak Brotherhood^1-p.59
• Kaligar - one of the Fallen^2-p.44

Other

• Khorne-worshipping drift pirates^1-p.100
• Sulsalid Ordinators^1-p.101

Sources

• ¹ Imperial Armour Volume Nine - The Badab War - Part One pp.57, 59, 100, 101
• ² Codex: Dark Angels (4th Edition) p.44