This book offers a comparative study of military reserves in contemporary democracies. A combination of budgetary pressures, new missions and emerging military roles during the past three decades has led the armed forces of democracies to rethink the training and use of reserve forces. Moreover, reservists have become central to the armed forces as part of moves towards "total" or "comprehensive" defense. Despite this, a scholarly bias towards studying regulars and conscripts means that reservists and reserve soldiers continue to receive only marginal attention. This volume fills that lacuna through a series of country studies examining how best to understand the peculiarities of reservist service. In contrast to regulars and conscripts, reservists are marked by their dual management of civilian and military careers, different family dynamics, diverse motivations and commitment to the armed forces, the material and non-material incentives they are offered, and their place in the political sphere. This volume suggests two frames to make sense of such differences: first, it looks at reservists as "transmigrants" traveling between the military and civilian worlds; and, second, it analyzes the multiple informal "contracts" and negotiations that bind them to the military. All the chapters adopt these conceptualizations, granting the volume a common focus and integrative frame. The volume will be of much interest to students of military and strategic studies, civil-military relations, sociology and International Relations.