[Strategia_In_Ultima]

I'd try to reason with them, but I'd ready my Special Forces at the same time, in case the talks go wrong. Steal all their research and the resources necessary to make (solar) nukes, abduct or kill the scientists (I'd prefer abduct, but if that's impossible, well shucks then, snipe 'em) and put pressure on the leader(s). But only if I'd run out of other options.