Immediately after World War II Australia embarked on the greatest immigration program in its history. Over the following decades immigrants flooded into the country, changing it forever. They came from Europe and later from Asia and other parts of the world. At first they filled a huge gap in the labour force, providing the economic strength for national expansion in manufacturing and infrastructure development. This is the story of how the program was planned, where the people came from, and how they became Australians with their own distinct identities.