The Bloodmaw

The Bloodmaw was the name of the joint-Imperial excoriation campaign conducted by the Star Wardens Space Marine Chapter alongside Tysaerian Armoured Guard regiments of the Astra Militarum, to cleanse the blighted world of Ghulor VI from the taint of the renegade Astra Militarum regiment known as the Crimson Typhoon and their daemonic allies.

Background
Upon the dry and blighted world of Ghulor VI, the Star Wardens would have their true mettle exposed and tested. Dispatched by Roboute Guilliman to investigate the presence of a group of Khornate traitor guard known as the Crimson Typhoon, the Star Wardens landed upon Ghulor VI alongside the 85th, 667th, and 212th Tysaerian Armored Guard. Blood was spilled by both sides as a intense tank battle engulfed the southern continent of the planet. The Star Wardens engaged in series of rapid strikes to cripple the rear lines of the Crimson Typhoon, however the slaughter the Imperial forces helped create unknowingly played into the hands of the traitors.

As blood ran in rivers the Crimson Typhoon was able to summon a warp rift known as a the Bloodmaw, spawning a powerful Bloodthirster and his legion of baying red-skinned daemons. The Imperials were quickly put on the defensive as they took heavy casualties. The Star Wardens losses against the charge of the Bloodthirster included Commander Falken and Master Zephran Caul. The Bloodthirster was only banished when First Captain Joachim Garen led a furious counter-attack, slaying the daemon with help from the chapter's dreadnoughts and Aggressors.

However, the battle was far from won as the Imperials struggled to resist a neverending tide of blood-mad warp creatures. The tide was finally turned when Guilliman alongside his Indomitus Crusade arrived at Ghulor responding to the distress signal sent by the Star Wardens. Only then was the Bloodmaw ended and Ghulor VI reduced to a cinder. The Tysaerians had taken grievous casualties and were forced to combine their forces into a reconstituted 212th regiment, and the Star Wardens for their part had lost hundreds of astartes and were filled with shame for their perceived failure. The newly promoted Commander Garen swearing that such an event would never be repeated.