EXPERT PERSPECTIVE — Even with a broad understanding of the grey zone, it may be tough to place into strategic perspective the grey zone actions we see. The instruments of the grey zone are various and evolving: cognitive warfare; cyber operations; use of surrogates, proxies, and ambiguous forces; aggressive espionage; political and financial coercion; and darker instruments resembling sabotage and assassinations come to the highest of the record, however there are others.