Second attempt - after more info kindly provided by Davebhoy on the first thread showed that I was barking slightly up the wrong tree....

My dad is looking for the words to a song that the thought went
"it wasn't the yanks that won the war it was my boy Willie".

However - Davebhoy found a link that indicated that the correct words were "it wasn't the TANKS that won the war it was my boy Willie". The Willie being a prior variant of armoured car it seems.

If anyone could tell me the words to the song then I'd be very grateful!

"My Boy Willie" is the regimental march of the Royal Tank Regiment, so if no one here can help then I will try writing to them.

Cheers all

k