The song "Glad It's All Over" by Captain Sensible conveys a sense of relief and celebration that a conflict or war has ended. The lyrics touch on themes of secrecy, hidden agendas, and the impact of war on people. The repetition of "We're glad it's all over" emphasizes the joy and gratitude for the cessation of conflict, while also hinting at the darker aspects of war and the toll it takes on individuals and the world at large. The mention of submarines, hidden tunnels, and guarded fences symbolize the clandestine nature of war and the unseen consequences it brings. Overall, the song reflects on the aftermath of war and the hope for a peaceful future.