As the Japanese swept towards Australia in 1942, they carried with them chemical weapons, already used with deadly effect in China. To counter the chemical warfare threat, Australia covertly imported around a million chemical weapons (including sixteen types of mustard gas), hiding them in tunnels and sites around the country. This book tells the story of the importation, storage and 'live trials' of the deadly weapons. It reveals details of the chemical warfare agents themselves, Australia's retaliatory plans, and the involvement of the USA.