Xana Incursion - Breakout: By the fifteenth solar hour after open hostilities had begun, the Xana System was awash in flame and spiralling wreckage. The remaining Xanite war fleet, which had engaged the Amphion's battlegroup, was now hurtling back to Xana II. The Mechanicum fleet was now about a third only of its early strength, having sustained further heavy losses in disengaging from the Loyalist capital ships, which had used their remaining fire ships against them as they tried to withdraw.The surviving Loyalist battlegroup, including the battered but unconquered Amphion, did not pursue, instead taking the opportunity to disengage themselves, their own arsenals having been all but exhausted by the protracted void battle and each one having sustained great damage from the fight.In the debris belt of Xana I, now aglow with burning hulks and torn by storms of exploding munitions, the outcome for the vast arms fleet had been even more disastrous as more than two thirds of the macro-transports had been either destroyed outright or sent burning to plunge into the gravity well of the gas giant or to tumble helplessly into the void.The architects of this disaster, the Dark Sovereign and the Legiones Astartes of the Ist Legion, were also departing for the system's edge, one of the great barques and the dromond Mu-571, now the Dark Angels' prizes, struggling to keep up with the warship's escape velocity.The fires raged also on the surface of Xana II, though now the whole Forge World had risen up against the invaders they had allowed into their midst.Of the three great Xanite forge-fanes, only Setna had come through its attack all but intact; the invaders having penetrated as far as the vast, sub-surface galleries before being met by Setna's most bellicose guardians, a contingent of Knights of House Malinax, long veterans of war far from Xana II's soil. Here the grim Legiones Astartes had been met by a score of Mechanicum-patterned Knights, and though nearly half of the Knights present had perished in countering the onslaught, the invaders had been burned and crushed in their hundreds, the fighting halting only when the last of the Space Marines had been bodily broken beyond whatever bitter thread of life propelled it.The other two great forge-fanes of Xana II had not fared so well and of the two, famed Tephra had suffered greatly, with one of its mighty reactors breached and detonated, rending several square kilometres of its heart into radioactive slag at the cost of tens of thousands of lives lost and vast resources of machinery destroyed before the invaders were finally overwhelmed through sheer weight of numbers.The damage to its sister forge-fane of Escorial was not as great, but widely diffuse, the enemy having spread to its tangled arteries of tunnel-way and gantry, and the last remnants of the invaders, though reduced to a mere handful of ruined bodies, were still causing havoc in the depths.Matters on the moon of Xana-Tisiphone had ended in an even bloodier state, the prison-forge itself having fallen under the assault of the Loyalist Legiones Astartes under Endryd Haar's command and the firepower of the captured Ordinatus Ulator, the population descending to violent anarchy and revolt which further allowed Haar's forces to ransack the weapons testing facility there before being suddenly and savagely beaten back by a counter-attack from below.The forces which assaulted them, brazen-armoured Legio Cybernetica cohorts, had slumbered deep beneath the Sheaol penitentiary and were strange, hitherto unknown patterns whose almost diabolic appearance was at odds with any recorded Mechanicum pattern.Moving with unheard-of speed and predatory instinct, these battle-automata drove back the Loyalist Legiones Astartes, killing many and forcing a retreat when all that the Loyalists had gained was soon endangered, the counterattack culminating when one of the prized Ordinatus, the Nepothax, was assaulted and destroyed in an attempt to recapture it.Reluctantly Haar's forces withdrew, taking their surviving prizes with them and departing the planet, their ship, the Tyrannis, herself sustaining heavy damage in her escape, barely outrunning the returning Xanite fleet.The Xana Incursion was over.