How war fired up indigenous soldiers, and Japanese espionage - fact or fiction?

Indigenous soldiers who fought in WW felt betrayed when they returned, then formed the first radical Aboriginal political organisation. And, before the Pacific War, Australia had a strong business relationship with Japan. But were there spies in the mix? 

Guests:

• John Maynard, historian, author, Emeritus Professor at Newcastle University. Contributor to the book ‘Challenging Anzac: stories that don’t fit the legend’ (NewSouth) 
• Nick Hordern, author, former diplomat, former policy advisor, former journalist. New book ‘Loyalty: Australians, Japanese and Espionage, on the eve of the Pacific War’ (Australian Scholarly Publishing)