Provides an overview of Australias involvement in WWII. Part 4 - The nearly one million Australians who served in the Second World War came from a different Australia, a country of loyalty to Britain the the Empire. They were men and women hardened by the experience of the Great Depression and memories of the First World War. From Tobruk to Singapore, they fought in desperate campaigns as the war brought us close to the edge, with the Japanese pushing relentlessly towards Australia.