Combined Army: The alien menace!
Whilst humans fight each other a new and terrible threat has entered the human sphere and formed a bridgehead from which to launch vicious attacks against the human race.
This new threat is made up of a combined army of alien species seemingly under the domination of an evolved intelligence. The combined army have more advanced technology, ferocious inhuman troops and have withstood all efforts to remove them.
At the moment the small expeditionary force seems content to hold its' ground - most likely until reinforcements arrive. Humans can only dread to see what horrors the next waves of the combined army bring.
The combined army is the gravest threat to the human sphere, they care nothing for factions or politics - only conquest.
The evolved intelligence known only as the E.I. has subdued dozens of species, bringing their technology and resources to strengthen the E.I.'s forces.
They bring to war with them the most formidable combat machines known to the universe along with several other races of horrific aliens species - all under the dominion of the E.I. This is a terrifying foe!
The combined army are here to assert their dominion over all species they encounter, the human race is simply the next on the list.