The betrayal of Shaitan and the Free Machines against the Satellites of Ares has been uncovered by the Parliament of Skywell. Worse still, the Machines have assumed leadership of the IZ colonies and have begun a systematic extermination of the 'Y' chrome carriers of the population through a religious crusade.

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The Rainmaker has declared war against the Free Machines, ordering the Supervision Army to return from Jove to repel the traitorous artificials from the Protophyll colonies and the IZ trade lanes that sustain Ares.

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In a strange vision of the future, the legacy of humankind will fight against itself and their enlightened creations for survival. The Age of Ares is over, Aphros is in the ascendant, the Chromosome Wars have begun...