http://www.nfb.ca/film/Churchills_Island/
This film won the NFB its first Oscar® and was also the first documentary to win this coveted award. It presents the strategy of the Battle of Britain, showing with penetrating clarity the relationship of the various forces that went to make up the island's defences. 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 defences, the mechanized cavalry, the merchant seamen and behind them all, Britain's tough, unbending civilian army.