This book examines the gender and family dimensions of mobilisation for the First World War in the Ottoman Empire, situating the war in a long-nineteenth-century social history of Ottoman military reform for the first time. It focuses on the military legal concept of muinsizlik (sole breadwinning) and how this concept shaped Ottoman military policy - namely, how militarisation and mobilisation were supported by the exploitation of women's care and social reproductive labour, as well as the extraction of material and physical resources from Ottoman families. In exploring how war worked at the level of the body, the individual and the family, this book demonstrates how Ottoman society and war became imbricated through processes of militarisation that led to significant consequences during the First World War and its aftermath. Based on a gendered reading of Ottoman military and bureaucratic archives, it addresses a pivotal moment in the modern history of the Middle East that has long awaited further study from a bottom-up perspective.