During World War II, a secret department was formed at Britain's Air Ministry to coordinate a strategy to defeat German bombing by means of deception. With the help of leading technicians from the film industry, ingeniously designed decoy airfields, towns, and military bases were built throughout the island. This campaign of illusion, masterminded by the charismatic Colonel John Fisher Turner, did more to protect Britain's forces and civilians from the Nazi threat than, at the time, they were allowed to know. This is the only detailed study of Britain's bombing decoys, both at war, through their design, locations, and operations, and at peace, through their fragmentary survival as enigmatic features in today's landscape. It draws upon a wealth of new research into wartime documents, and includes detailed maps and data showing the patterns of decoy sites across the country. Compiled in support of English Heritage's initiatives to study and preserve Britain's wartime remains, Fields of Deception explores the history and the legacy of one of the least-known aspects of Britain at war.