"Coalition" attack on Corticant fails

For years the Necron threat had been contained on Corticant, at least according to the Imperium. In fact, the Harakhty Dynasty as a whole had been suffering problems with its reannimation protocols, and since 011.M42 their armies had been gradually falling back into hibernation. Realising the dire thresat to there empire, the lords of the dynasty went over to the defensive, and appealled to help from any necrons able and willing.

Meanwhile the alliance, having become bogged down on Libria IV thanks to the overwhelming numbers of the Imperial fleet, had for many months planned to cut the loyalist supply lines by attacking the space lanes linking Libria to the rest of the Imperium. One such lynchpin in this supply line was Corticant, and the imperial base was within striking range of Federal and tau forces based in the Perseus Deeps.

On 2209.016M42 a large alliance force landed on Corticant, made up of Skyfall's tau cadres and recent additions to the Federacy, Ultramarines from the time of the Horus Heresy who had once again fallen victim to the strange warp anomaly which had trapped first Haskell then Appollo's Iron Warriors. However the first contact made by the alliance was not with the Imperium at all. Insteads, while the imperial forces, alerted to the invasion, prepared for the alliance assault, the alliance were contacted by a strange alien emmisary.

The necrons had reinforcements, and after a long and tense negotiation both the alliance and necrons agreed that their common enemy was the imperial presence on Corticant. They could no agree however the terms of a settlement after the imperial forces had been defeated, and this forced both parts of the "coalition", to keep significant forces in reserve, watching each other. This would prove to be a significant problem as the assault on the Fort Bastion commenced.

In defence, General Veers, still in charge of the Perseus theatre but losing prestige following the loss of Minos, had regiments of the Lycaon, Volscian and Novgorod Guard. In addition a knight detachment significantly bolstered the imperial fighting ability, and as the coalition forces attacked the battle soon became a vicious firefight in front of the fort proper. Far from sitting behind their defences the imperium had come out to fight.

The battle continued for some time, but eventually imperial numbers told, and the coalition forces were unable to take key objectives. By 0110.016M42 the tau were in retreat, and the necrons abandoned their attempt to retake Corticant, for now. Frustrated the alliance similarly cancelled the invasion of Corticant, seeking alternative strategies to disrupt the war on Libria. The battle resulted in a badly needed win for the Loyalist Imperium.