102 Earth Standard Years ago, resistance fighters won a hard fought war of independence against the Eastern Alliance, battering them and driving the few survivors into the depths of uncharted space, and establishing the Colonial Federation in the process. The Colonial Federation eventually became the pinnacle of civilization and a beacon of freedom. Settlements were built and the warmth of liberty spread throughout space. Just days after a corporate survey ship jumped into the supposedly uncharted Epsilon Ceti system, the news came that the Eastern Alliance not only survived, but had established itself as a formidable military power complete with a vast army of genetically enhanced soldiers and an equally formidable navy. The "Commonwealth" as it now called itself wasted no time in initiating hostilities by backing insurgents and using nano-virus weapons against Colonial Federation worlds, killing millions in days. Their goal is the extermination of those who live on and around what they call 'the sacred planet.' All that stands between freedom and extinction is a rogue A.I., a squad of Marines and their dropship pilot.
I enjoyed reading the synopsis of your story.