The Alliance wars

"'We're under attack by a unknown force commander.'  'They have tech we have never seen before sir...' Eternal Alliance scout describing the The Unity during the first engagment in the war "The Alliance wars, also known as the Alliance war was a brutal and destructive major wide galaxy spawning conflict that lasted approximately sixteen years from 3630 BBY to 2985 BBY. The Eternal Alliance which had lost much of its naval strength after the Mission to Nathema, during this time and following the death of Theron Shane and departure of Lana Beniko, the Alliance commander faced his greatest threat a malevolent, brutal, powerful and ancient precursor alien race known only as The Unity. The Unity's goal was the complete and total assimilation of the galaxy. The Unity which was a race of technology advanced bio-machines believed that life's evolution was not yet complete and by forcibly assimilating all life in the galaxy, the evolution would be complete. The Unity operated like a hivemind and was lead by the entity which was known only as the Abathur, who believed that evolution by forced assimilation was the only way to achieve peace and unity.

The Eternal despite losing the Eternal Fleet and the Gravestone a few months prior and losing key personnel such as Theron and Lana Benkio kept on fighting. However, they didn't understand their enemy as they're no records on the Unity's origin and/or homeworld. The Eternal Alliance Intelligence theorized that the Unity was the result of a doomed Republic colony fleet that tried to colonize a nearby galaxy and was assimilated by Abathur, the reasoning for was that much of the Unity was comprised of humanoids who bare an uncanny resemblance to humans.

The Unity used biological weapons they created or modified such as a modified variant of a sith biological weapon, and the fierce alien hybrid guard/attack dogs coined the "Xenomorphs" by Eternal Alliance troopers. The Unity also "glassed" planets that refused to be assimilated into the Unity the survivors were usually used for either biological experiments and/or assimilates them by force. The Unity also captured Knights of Zakuul, Voss Mystics, Jedi, and Sith and tried to understand the force. Abathur believed the Force to be a result of a mutation in certain individuals DNA strand and tried to replicate this in his army but failed. Eventually both the Sith Empire and The Galactic Republic tired of bashing one another seeing the Eternal Alliance weakened tried to reclaim their glory with a joint military alliance, however, the Republic world of Ryloth was brutally attacked and Glassed by the Unity and the Unity unleashed a nano-virus upon the Imperial citizens on a massive asteroid station "Jade station". The Republic and Sith turned their attention to the Alliance War.

The Unity continue their attack eventually attacking key Eternal Alliance planets such as Odessdon and Zakuul. The Eternal Alliance was able to fend off the Unity but were heavily outnumbered and as a result, suffered from heavy casualties.