Shaping the Holistic Concept of Multi-Domain in a Legal Vacuum. A Tricky Issue
The recognition by the US and NATO of 'new' domains of operations, namely the cyber and (outer-)space, plus the information and the electromagnetic spectrum (EMS), makes the traditional partition of physical domains of land, air, maritime obsolete (Marsili, 2019a). While classic domains are generally well understood conceptually, to the extent that joint doctrine does not feel the need to define them, the new domains are much more difficult to conceptualize and bound within a constructive definition (Donnelly & Farley, 2019, p. 9). Since the cyber has been recognized by NATO as a domain of operations (July 2016), and the Alliance has approved the first-ever space policy (June 2019) – a step towards the acknowledgment of space as a warfighting domain, as President Trump has officially characterized it (August 2019) – the doctrine has speeded the integration of all domains (Marsili, 2019a). The concept of cross-domain operations is not new, but multi-domain has increased in popularity over the past decade as military services, those of the US, inter alia, have sought to codify their approach to warfare beyond the traditional confines of land, sea, and air (Marsili, 2019; Reilly, 2019, p. 16). What they are committed to are converging military capabilities across the joint force with continuous integration across multiple domains (Marsili, 2019a; Townsend, 2019, p. 29). The discussion about 'Multi-Domain Operations' (MDO), i.e. how operations are conducted in time and space with synchronization of the other domains, has been stimulated since new domains such as the cyber and space have emerged next to the traditional domains of air, land and sea — emerging and disruptive technologies have further complicated the operational environment (OE). We then moved quickly from a concept of cross-domain to multi-domain (Marsili, 2019), without the time to define any of the new domains — neither of the classic domains. Rather, the doctrine does not provide us with any definition of the basic term 'domain', and this ...