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Operation Hydra of the night of 17/18 August 1943, involving 596 heavy bombers of the Royal Air Force. Intelligence about the existence and location of the program was allegedly obtained from the secretly recorded conversations of a German officer, Wilhelm Ritter von Thoma, who was a prisoner of war of the British.<unk> ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️