Bxample & AA
I've meet Rhodesians in the USAF and they got on quite well, but both did emigrate to the US in their teens and went to US colleges.
Actually, I think there are upsides to being an Aussie/Yank--different viewpoints, Yanks love Aussies in general, exchange officers usually have good tours in each country. I think the Aussie accent on pedantic ways to be a benefit.
GF