Mission: Crossfire.
Secondary Objectives: Linebreaker, Oaths of Moment and Slay The Warlord.
Opponent's Secondary Objectives: Attrition, Engage On All Fronts and Mutate Landscape.
When Imperial Navy patrols detected activity at the abandoned geothermal mining station at the base of the active volcano Mount Sybo, they reported it to command. Further patrols confirmed the presence of Thousand Sons traitor marines at the site. As the closest Imperial strike force to the site, the Rift Wardens were dispatched the handle the traitor threat and determine their activities within.
The initial clashes were around the defensive gates at the base of the volcano on the northern side. The Thousand Son attacks were irresistible and the Rift Wardens were prevented from making progress. Chapter master Artherus attempted to split his forces into two companies but the effort was stopped by a swift counter attack by the enemy forces. What should have been a swift battle has bogged down into a stalemate with neither side granting ground to the enemy. Unwilling to retreat any further, Artherus has elected to stay and fight to the bitter end.