The Brazilian military has recently executed an unexpected return to politics by engaging more actively in domestic policymaking and implementation both before and during the Bolsonaro government, thus jeopardising democratic consolidation. To help understand this development, we examine why the military openly challenges civilian authority over some issues, while remaining silent on others. Whereas prior work emphasises external factors like civilians’ threats to military prerogatives, we argue that contestation of civilian authority stems in no small part from internal military conflict over how to utilise power. The military uses contestation to coordinate prerogatives with civilians and to communicate within the armed forces to increase cohesion. We illustrate this argument with case studies of military contestation surrounding political leadership selection and internal security, using the Army Commander's discourse via Twitter posts and public statements, plus key informant interviews and military publications.
