I assume two Empires, A and B. A direct conflict between them would be tantamount to total annihilation, as both sides possess nuclear weapons and noone will be the first side to use them.
They also have both acquired the ability to wipe out the entire biosphere, as would have been previously possible with the nuclear weapons.
Provided one of the sides discovered technology to cause drought and flooding by climate control and earthquakes and subsidence by methods of vibration applied to the ground of their planet.
That would provide them with a crypto-military macro alternative, namely bringing down pseudo-natural elemental disasters upon the other empire through climate or seismic tempering.
However that would not be pseudo-natural for long, as anyone who is himself able to act cryptomilitarily will recognize similar actions taken against his empire.
If either Empire was now attacked cryptomilitarily, would the revelation of the attack to the own public (and as much possible to the public of the other Empire) make such attacks unpractical?
Would the revelation of the possibility of cryptomilitary attacks, which inevitably would have to entail some information about the method of attack, make the employment of such methods less feasible, as the awareness of the mechanisms and necessary precursors for such an attack to succeed would now be recognized by the public and hence, cause the public to look out for signs of such methods of attack being launched at them (with the invariably occuring accusation that such attack was launched by one's own empire against one's own public)?
So if I am Empire A and I put a drought on Empire B and Empire B finds out about it, it would not tell about it to all because then it couldnt use that method itself anymore, right?