Obsidian Jaguars - Notable Campaigns: Bennghil VII Campaign (Unknown Date.M42) - With the aid of the Space Wolves, the Obsidian Jaguars defeated a force of Chaos Space Marines on Bennghil VII, forging a lasting alliance between the Chapters.Defence of Ceibhal (Unknown Date.M42) - During the Psychic Awakening, the Chapter's fortress-monastery, "the Sabre," on their homeworld of Ceibhal, came under assault by a vast horde of Goff klan Orks while most of the Space Marines were off-world on campaign. The call for them to return was sent out, but until that time Captain Meznan commanded the Chapter's forces in the defence of their homeworld. Unless the absent battle-brothers returned, however, Ceibhal was likely to fall to the assault by Greenskins of the Goffs klan. In truth, by the time a Space Wolves strike force led by the Wolf Lord Erik Morkai finally arrived, Ceibhal had been claimed by the Orks. The Obsidian Jaguars fleet defending Ceibhal had also been destroyed, but Morkai still hoped to be able to recover the Chapter's gene-seed from their fortress-monastery. He infiltrated the Sabre with a strike force of his fellow Space Wolves, but it had been desecrated, its walls decorated with the corpses of the Obsidian Jaguars Astartes who had died defending it. Even worse, Morkai's warriors were only able to recover a small portion of the Obsidian Jaguars' gene-seed, as most of it had been destroyed or made unusable by the Orks. With little more to do, the Wolf Lord's strike force made their way off-world shortly before they activated explosives that destroyed the Sabre.Indomitus Crusade (Unknown Date.M42) - The Obsidian Jaguars were assigned to serve as part of Task Force XI of Battle Group Kallides of the Indomitus Crusade Fleet Primus. Battle Group Kallides fought against the Necrons located in the foreboding region of the galaxy designated the Pariah Nexus.Argovon Campaign (Unknown Date.M42) - This campaign of the Pariah Crusade was fought in the Argovon System within the Pariah Nexus region. The Imperial forces faced the Necron Szarekhan and Oruskh Dynasties. The campaign was spearheaded by High Field Marshal Janred Remko Hynflagger and his Task Force XI, which possessed a contingent of Space Marines provided by the Obsidian Jaguars. The Obsidian Jaguars, along with other Imperial forces like the Tome Keepers, were tasked with the destruction of a pair of Dolmen Gates on Hishrea, the sixth and outermost planet in the Argovon System, which were being used by the Necrons to bring reinforcements into the system. Though the approach to the gates was carefully scouted, the Imperial advance was caught entirely unawares when Necron pylons erupted from the ground and began tearing through their ranks. Only the intervention of the Tome Keepers and Obsidian Jaguars prevented a wholesale massacre. The Dolmen Gates were finally destroyed after two solar months of gruelling warfare, but the victory proved a pyrrhic one. A Necron tomb fleet soon arrived in-system, forcing a full-scale Imperial retreat from Hishrea. The war in the Pariah Nexus would grind on.Charadon Campaign (War of Rust and Slime) (Unknown Date.M42) - The Charadon Campaign began during the Noctis Aeterna when the Death Guard Chaos Lord Typhus the Traveller seized his chance to invade the Forge World of Metalica and plunged the Charadon Sector of the Ultima Segmentum into war. A force from the Obsidian Jaguars aided Chapter Master Dhane Tanielu of the Excruciators Chapter in his own last stand in the Alumax System. He gathered elements from the Ultramarines, Sons of Medusa, Iron Knights, Obsidian Jaguars, and others into a combined force called Strike Force Scourge to defend against the Death Guard.Octarius War (Unknown Date.M42) - When the conflict between the Orks of the Ork Empire of Octarius and the Tyranids of Hive Fleet Leviathan spilled out into the Pankallis Sub-sector of the wider Octarius Sector in the Era Indomitus, the Obsidian Jaguars contributed 400-500 battle-brothers -- almost half the Chapter's complement -- as well as 150 vehicles, 1 battle barge, and 3 strike cruisers to the Imperial campaign to contain the xenos assault.