If there is some unresolved tension in the ideas of mission command and synchronisation – particularly within the MDO concept – then it could be more useful to think about the USMC idea of Coupling: the idea of providing linkage between warfare activities that are needed for to meet the task and/or mission. Instead of simply connecting everything because it’s possible, the Corps advocates for an approach that provides the means on a case-by-case basis. Interestingly, it is explained best in MCDP5 (USMC Planning) penned back in 1997, and signed off by the legend who is General Charles C. Krulac. Talking about C2 (reality and theory) is best done with a marine and Peter was joined for this discussion by Sean Welch, a marine with the intellectual and operational credentials to offer some important perspectives founded on the reality of combat.