The notion of the First World War as 'the great seminal catastrophe' (Urkatastrophe) of the twentieth century is now firmly established in historiography. Yet astonishingly little has been written about the fate of non-combatants in occupied and non-occupied territory, including civilian internees, deportees, expellees and disarmed military prisoners. This volume brings together experts from across Europe to consider the phenomena of captivity, forced labour and forced migration during and immediately after the years 1914 to 1918. Each contribution offers a European-wide perspective, thus moving beyond interpretations based on narrow national frameworks or on one of the fighting fronts alone. Particular emphasis is placed on the way in which the experience of internees, forced labourers and expellees was mediated by specific situational factors and by the development of ‘war cultures’ and ‘mentalities’ at different stages in the respective war efforts. Other themes considered include the recruitment and deployment of colonial troops in Europe, and efforts to investigate, monitor and prosecute alleged war crimes in relation to the mistreatment of civilians and POWs. The final contribution will then consider the problems associated with repatriation and the reintegration of returning prisoners after the war. This book was published as a special issue of Immigrants and Minorities.