This article draws on empirical data with British military personnel in order to investigate what we call the digital mundane in military life. We argue that social media and smartphone technologies within the military offer a unique environment in which to investigate the ways individuals position themselves within certain axes of institutional and cultural identities. At the same time, the convolutions, mediatory practices and mundane social media rituals that service personnel employ through their smartphones resonate widely with, for example, youth culture and digital mobile cultures. Together, they suggest complex mediations with social and mobile media that draw on and extend non-military practice into new (and increasingly normative) terrains.