WWII Aussie slouch hat.

[Harlan (Deceased)]

Nice work Hatch! You beat me at my own game. That was good searching and it wasn't even obvious when you found it.

I wondered when it wasn't coming up on the lists I looked at if it might be a smaller elite group.
(I bet I know someone who'll be ordering a book!)

[Anzac15]

You bet I'll be ordering a book! And yes, it didn't dawn on me til later, no wonder it took so long to find. As I understand it, the 2/1 was only in existence for 3 years, and at it's peak rostered 550 men. Small unit tactics for sure!

[Hatch]

It stumped me also. After looking through so many books, it turned out to be on the cover of a book, right near the computer all along.

Also ( I maybe incorrect, so you may want to confirm this elsewhere ), but I 'think' this unit started with a patch that was yellow/green then later went to orange/green as we see here. So you may have seen the other patch in your searches, and of course not connected the two.

All part of the enjoyment though, when you have to search for information on something like this, it makes it even more special to you.