The Conclusions explore the consequences of our arguments for the study of late antiquity more generally and the patterns of Roman military organization. The Roman military was among the most important institutions in the ancient world, and revising its history has ramifications for such perennial questions as imperial decision-making and Roman identity. Moreover, our reconstruction creates new questions, in particular about the economy of the fifth-century east Roman empire and its ability to mobilize and sustain the armies described by the Notitia. This chapter concludes by situating our revised narrative within the longe durée of Roman military history from Augustus to Byzantium and identifying the major considerations, including many non-military considerations, that motivated the empire’s various military configurations.