For a hundred years the Royal Air Force has been at the forefront of the UK's defences. In the 1920s and 1930s, the RAF protected Britain's empire; during the Second World War it played a key role in defeating the Axis; and through the 1950s and 1960s it was a key part of Britain's nuclear deterrent. Julian Hale examines the history of the RAF through its organisation, personnel, aircraft and campaigns, from the biplanes of the First World War, through its `Finest Hour' in 1940 and the dawn of the jet age to today's hi-tech aircraft and the emerging role of the unmanned aerial vehicle. Enriched with personal accounts and a wealth of photographs, this book provides a concise introduction to the world's first air force.