Suzy Klein explores the use, abuse and manipulation of music in the Second World War - from swinging jazz to film soundtracks and from ballads to ballets. The war, she demonstrates, wasn't just a military fight but an ideological battle where both sides used music as a weapon to secure their vision for civilisation. Suzy reveals how the forces' sweetheart Vera Lynn was taken off air by the BBC for fear her sentimental songs undermined the British war effort. She reveals the war work of two British composers. Walton's Spitfire Prelude became the archetype for a particularly British form of patriotic music. By contrast, Tippett was sent to prison for being a conscientious objector, but his anti-war oratorio A Child of Our Time was showcased at the Royal Albert Hall. Suzy examines Olivier Messiaen's haunting Quartet for the End of Time, written in a POW camp. At Auschwitz, Suzy reveals how music was co-opted to serve the Nazis' evil purposes.