Hi Lads,
Believe it or not, this bio actually simplifies the issue a little. His INITIAL enlistment was with the RAAF to train as a navigator. Midway through training the demand for aircrew declined and the chance of active service was disappearing. He jumped ship to the AIF and was subsequently mustered into the commandos. If you review the WWII Nominal rolls at
World War Two Nominal Roll and search for Zupp, he shows up under RAAF and Army and the dates tell the tale.
His service in New Guinea was towards the close of the war. He landed at Wewak and served out of Karawop and the surrounding areas in 1945.
A book on Dad????
Cheers
Owen