Points: 1200.
Mission: Against The Swarm.
Detachment: Anvil Strike Force.
Opponents Detachment: Traitoris Lance.
Agendas: Head Hunters, Monstrous Targets and Priority Kill Zone.
Opponent's Agendas: Battlefield Survivours and Drive Home The Blade.
The Battle of Sector Theta 9 was the opening attack of a new Chaos assault on the Imperial defenders of Mortwald. Chaos marines, supported by House Vextrix on the flanks, attacked the Rift Warden positions, which defended the heart of Sector Theta 9. The forces of Chaos captured the outer districts with ease and they turned their attention inwards.
A phalanx of Chaos Knights marched into the center of District Theta 9, with three more in reserve behind them. They advanced from one district to another, slaughtering all in their way, and finally reached where the Imperial forces had built up a defensive position. A dark shadow fell across the streets, cutting the advancing war machines from view, just as the Rift Wardens counter-attacked. Meanwhile, the Astra Militarum fell back to higher positions although they suffered many casualties as they did so. The Rift Wardens found themselves locked into a deadly battle. One from which they could not, at this time, extricate themselves.
A substantial amount of ground had been captured by the Chaos forces, except for some areas on the right flank, where Imperial resistance proved strong. A large number of casualties were inflicted on the Rift Wardens during the attack but they were able to regroup when chapter master Arthurus joined the fight, forcing the Chaos Knights back under his valiant attacks. For the next few days, bot sides made frequent attacks to improve their positions, much hampered by a constant barrage of heavy weapons fire.
Finally, the Chaos Knights made a full on assault against the Imperial defence lines. At this time, Arthurus declared Sector Theta 9 lost to the enemy advance and pulled his battle brothers out. This proved a controversial act as it left the Astra Militarum defenders to be largely slaughtered by the Chaos forces.