This book provides a concise statement of the state of knowledge and future research priorities relating to twentieth-century military remains in Britain - an emerging area of intense archaeological investigation. The chapters cover and analyse the results of over three decades of valuable research on documentary evidence, oral history, official papers, physical remains in the form of archaeological and architectural evidence, wall art and graffiti, and the character of militarised areas - including the large scale strategic studies such as the Defence of Britain project.