The Siege of Terra is over. Traitor forces are retreating, but they remain a significant threat, and the Loyalists are in pursuit. Sector Tenebris was cut off by the Ruinstorm for a long time, but it is now an important transit point for traitor forces retreating after the Siege. It’s heavily fortified and shielded, and can be held for a long time. The local traitor warlord has decided to hold it against the pursuing Loyalists, hoping to blunt their strength and speed and form a rally point for his own forces passing through the sector. Can the Loyalists break the fortified ring around the city districts and seize the space port, or will the traitors hold it and claim victory?