There is no cyber war the same way there is no nuclear war
One of the staff at my school (King’s College, London) recently published a paper that used Clausewitzian definitions of war to declaim that there has been no cyberwar, cyberwar is not happening now, and cyberwar is unlikely to occur in the future. Of course it is easy to prove a point if you control the definitions and I will stipulate that the idea of two nations engaging in purely network and computer based attacks would result in nothing but fodder for cyber pundits and tech journalists.