More than fifty years following the launch of the Alien Assault Force, mankind started 
colonising the planetary system known to astronomers as KC-315. This system represented 
the most distant refuge, serving as depot and respite to those interstellar expeditions 
that sought to venture even further into the depths of space. 
 
Until that time, our only encounters with the Swarm had been aboard strange derelicts 
drifting among the stars, but this was to change abruptly when mankind discovered the 
first alien structures, later dubbed 'citadels'.
 
During a routine scout patrol looking for an appropriate location to build a new 
space depot, a recon droid sent back the first blurry images of a previously unseen 
structure several hundred feet tall, and possibly buried deep into the planetoid's soil. 
The sand-moon of Lia was evidently not as deserted as it had first appeared.
 
An excerpt from the commander's log follows:
 
We discovered a large looming tower at the moon of Lia, and without knowing its
origin or the secrets that lurked inside, a group of ten brave soldiers at my 
command entered the dark depths, never to leave that planet's accursed soil
again. This is a summary of what happened in those dark quarters, of how those
ten brave men gave their lives, so that others might live on. 
 
You may have heard otherwise - they probably told you these soldiers were traitors 
seeking only to destroy this citadel - but heed my words: We owe them everything!
.
