- last post: 01.01.0001 12:00 AM PDT
Well, as handy as an army of Spartans would be, the fictional humanity in this situation probably doesn't have an extra twenty years to spare.
I would try to engineer a sort of biovirus to use against them; they'd infect it, and it would trick their adaptive nature into fighting each other or self-destructing. I'm not sure what condititions you would need to simulate to convince them that self annihilation was the best solution, but I think one such scenario was explained in that episode of Evangelion- the one with the biomechanical nano-Angel.