Defence diplomacy represents a notable paradox. On the one hand, it is a cooperative activity to build strategic and moralistic trust between states and thus positively shape the environment in which foreign policy is made. On the other hand, defence diplomacy also involves competition and demonstrations of military power, which may contravene its goal of building moralistic trust and undermine confidence between states. This article deals with the latter competitive realpolitik elements of defence diplomacy in terms of secrecy, swaggering, and shows of force that have largely been ignored in the literature. Building on a theoretical discussion of whether defence diplomacy works, the case of peacekeeping in Southeast Asia is analysed to illustrate how defence diplomatic activities produce effects contrary to their stated aims.
