The creation of the Chief of Defence Staff (CDS) is a start to defence reforms. This should improve jointmanship in peacetime; however, joint wartime performance needs further reform and improvement. We face three problems: (i) historical lack of unified warfighting strategy formulation at the apex military level; (ii) the unclear division of responsibility and resources between service Chiefs and Commanders-in-Chief (C-in-Cs); and (iii) the differing natures of command and control between the three services, which manifest as differences in structural organisations.

The article approaches the issue of jointness through new lenses. It first describes how and why arms of the military, the ‘Services’, are different from each other. Airpower is shown to be the emerging technological paradigm, triggering paradigm competition. Next, it draws an analogy between anarchy in international relations (IR) and the existence of the services. It then looks at game theory as used in IR to understand both why inter-organisational competition occurs and how cooperation can evolve with a certain kind of behaviour—reciprocity.