In May 1943 a specially established RAF squadron made its permanent imprint on military aviation history by flying a high-risk low level nighttime attack against German hydro-electric dams vital to the Nazi armaments industry in the Ruhr Valley. A comparatively tiny part of Air Chief Marshal Sir Arthur Harris four-month-long Battle of the Ruhr this one raid had an impact totally out of proportion to the small number of aircraft involved. It highlights the synergy of science & technology weapons development & production mission planning & practice & the unflinching courage in the execution of a highly dangerous bombing raid. Furthermore it established a legend that still resonates today.