"Lili Marleen" is a famous song that originated during World War II. It was first performed by German singer Lale Andersen in 1939 and became popular among both German and Allied troops. The song tells the story of a soldier's longing for his love, Lili Marleen, as he faces the hardships of war. The song's haunting melody and poignant lyrics resonated with many, making it a symbol of wartime nostalgia. It was later recorded in multiple languages and covered by various artists, including Bing Crosby and The Andrews Sisters. "Lili Marleen" remains a significant cultural artifact from the era.