Editing Setting:Cloudburst/Glasians (section)

====Migration Two====
Before the second Glasian Migration arrived, there had been quite some time to prepare.  After decades of waiting for something to happen, the Exigent Task Unit Cloudburst was seriously considering disbanding when a new, larger fleet of aliens suddenly arrived.  Heralded by a sudden disruption of local psychic telemetry and communication, a massive Colony Control Cylinder of the Glasian flotilla emerged at the edge of the Septiim system.  While the Exigent Task Unit mobilized to counter it, terrified Astropathic messages from Chlorit, Celeste, and Clegran arrived as well, declaring the arrival of smaller Cylinders or battleships.

The Task Force quickly split their forces, and moved to aid the local defenders in the destruction of the Glasian fleets.  However, in no cases save Septiim’s own invasion did the Task Force actually manage to arrive before ground troops committed to the fight.

In Septiim, the Task Force took the worst losses.  The Control Cylinder flew straight past the asteroid base on the way in towards the inner worlds of the Septiim system.  The Exigent Task Unit managed to affect a boarding of the huge Control Cylinder, at the cost of forty percent of their remaining Marines.  The team sabotaged the Cylinder, but it was too late.  Millions of Glasians reached the surface of Septiim Secundus, Septiim Primus, and several asteroid and moon bases of the outer gas giants.  The few Marines who escaped the corrupted Control Cylinder’s ballistic hulk flew to Septiim Primus to aid in the defense of the population.  Meanwhile, the Marines of the rest of the Task Force undertook similar measures against the aliens in the other systems, save Chlorit.  Chlorit was overrun before the Marines could even arrive, and to the shock and horror of the Imperium, the Glasians destroyed Chlorit completely.

After a year of fighting in the systems hit by the Migration, the Glasians were finally exterminated.  Coriolis suffered the least damage, as they faced only the alien survivors of the Chlorit purge, but even they were not entirely unscathed by the fighting.  After the second Migration, the Inquisition formally began the process of establishing the new Chapter, albeit after decades of debate, first.  The Inquisition has never lost their distrust of Space Marines after the Horus Heresy.