The day after the North Vietnamese took Saigon, the city was woken by triumphal song. During the night the engineers of the victorious army had rigged up loudspeakers, and from about 5am the same tinny liberation melodies were incessantly played. It was 30 April 1975, and sharp early sunlight illuminated Saigon’s largely empty streets, at a time when the city’s frenetic traffic would normally have already begun to buzz. But hardly anybody knew what to do – whether to go to work or not, whether there would be anything to buy in the market, whether there would be petrol, or whether new fighting might break out. It was, of course, not just Saigon’s daily routine that had been utterly disrupted. Its established role as the capital of non-communist Vietnam had vanished overnight, its soldiers had disappeared, and many of its generals, politicians and civil servants were at that moment bobbing up and down on the decks of warships in the South China Sea, with US Navy blankets pulled round their shoulders.