" Other means were used to wear down the Germans and prevent them getting any rest. The 588th Night Bomber Regiment specialized in flying their obsolete Po-2 biplanes low over the German lines at night and switching off their engines as they made their bombing run. The ghostly swish made a sinister noise. These outstandingly brave pilots were all young women. They were soon dubbed the ‘Night Witches’, first by the Germans and then by their own side. "

― Antony Beevor , The Second World War