While literary scholars and historians often draw on the press as a source of information, First World War periodicals have rarely been studied as cultural artefacts in their own right. However, as this volume shows, the press not only played a vital role in the conflict, but also underwent significant changes due to the war. This Companion brings together leading and emerging scholars from various fields to reassess the role and function of the periodical press during the so-called 'Greater War'. It pays specific attention to the global aspects of the war, as well as to different types of periodicals that existed during the conflict, ranging from trench, hospital and camp journals to popular newspapers, children's magazines and avant-garde journals in various national and cultural contexts.