Basically all of Australia's well trained troops was sent abroad to North Africa and other places to fight for the Commonwealth.
Then in 42 the Japanese attack Papau New Guinea and the Australians have to scramble and send a badly trained group of conscripts with poor morale to face the opposition and die.
Well it is often in those circumstances that heroism prevails. Based on real events ..
I found a 2 part documentary from Australia's ABC , and a movie. So many interesting tales from the world wars that we know little about.
https://www.youtube.com/watch?v=QID0vSqeKFg
The movie:
https://www.youtube.com/watch?v=xeg7nufYBuM
Great stuff