By combining the AI platforms and assigning them duties to improve their associated partners, they created a community of intellect focused on the narcissistic goal of exceeding their masters. Fortunately for humanity, the attitude was not one of eradication; instead, it evolved into a question of government rule. The eventual AI logic resulted in the fact that humanity was a necessary evil that the AI community could not ignore for future survival and growth. It was resolved that humans needed a stricter set of guidelines to prevent their mutual destruction, thus placing AI survival in jeopardy.
Just when the AI army was fleshed out and ready to strike, a bombing that decimated two-thirds of the human population disabled all the Russian and Chinese AI systems, leaving the hidden facilities and their resident combat forces in the dark and abandoned. And then, a hundred years later, someone accidentally turned them back on again . . .