A classic presentation of the strategy of the Battle of Britain, the film shows, with penetrating clarity, the relationship of the various forces that went to make up the island's defenses. Here is the Royal Air Force in its epic battle with the Luftwaffe, the Navy in its stubborn fight against the raiders of sea and sky, the coastal defenses, the mechanized cavalry, the merchant seamen, and, steadfast behind them all, Britain's tough, unbending civilian army. The first NFB film to win an Oscar.