The warriors of which The Prophecy has spoken,ZODIAC was a mercenary organization that tried to find all of the "twelve heroes" that The Prophecy has talked about.
The mercenaries, who knew the war better than their own reflections,
The blessed ones, who could change the fate of the world,
The traitors, who left it behind to burn.
Every one of the twelve heroes works independently, some of them having groups of suppliers under them.
All of them are contacted by the intelligence network in case of any major conflict. Then heroes start bidding who will take part in it, as they never work together or against each other.
However, all of the "heroes" were already the people experienced in the art of war and organization changed into the mercenary group while waiting for the Extinction.