From the 1930s onwards, transnational broadcasting - that is, broadcasting across national borders - became a major element in the conduct of Britain's diplomacy, and the BBC was employed by the government to further its diplomatic, strategic, and economic interests in times of rising international tension and conflict. This book discusses BBC transmissions in various European foreign languages directed to occupied, neutral, and enemy countries during the Second World War, allowing for a comprehensive understanding of the BBC's broadcasting strategies in the lead-up to, and during, the conflict. This book was originally published as a special issue of Media History.