She appears to be part aboriginal herself.
It is equivalent to a Navajo or Cherokee sailor in the USA navy talking about spitting on the US flag.
It makes you wonder why she would voluntarily join the armed forces if she hate its so much.
Didn't see your post before I did Post #13.My limited knowledge (I've traveled that part of the world a bit) suggests Aboriginal and/or Pacific Islands...Maori perhaps.Australia and New Zealand have had a free movement agreement for some time so Maori seems possible to me.
And BTW...if any of them are still alive the Navajo Code Talkers just might take offense to your comment! ;-)