In providing commanders with the ability to command and control, computerised systems have been in use for more than 50 years. Their evolution from siloed systems inside individual units, moving across task forces, then to covering theatres has helped operators and HQ staffs orchestrate military means with increasing efficiency and lethality. The change in the last decade – according to Andrew Graham – has been in moving from enabling these domain-to-domain C2 structures to talk to each other, to one that has to integrate the data from each platform system to be seem by everyone else. Now that idea - based on an assumption of ubiquitous and constant connectivity - has evolved again. How can you operate a C2 system when to transmit data might spell certain death?