1942 was the year of Australia's greatest peril, a Japanese invasion, which many thought impossible came very close to happening. As Darwin was destroyed by bombing, Australian ships were torpedoed within sight of it's coast, midget Japanese submarines attacked shipping in Sydney Harbour, and the Japanese army invaded New Guinea on its inexorable march south. This is the real story of the genuine and imminent threat to Australia in that fateful year. For months, Australia's fate hung in the balance.