The work of the RAF bomber command has come under fire from a whole generation of historians since the 1960s. They claim that the RAF offensive against Germany was immoral because so many civilians were killed, and wasteful because so many attacks were not on specific military targets. In this book, Denis Richards, co-author of the official history of the RAF 1939-1945, describes the difficulties and failures, but redresses the balance by making clear the magnitude of Bomber Command's achievements. His account provides a revised interpretation of the battle fought virtually every night for almost five and a half years, in which over half the aircrew became casualties. Truly, it was the hardest victory .