ANZAC stands for Australian and New Zealand Army Corps. Our soldiers fought side by side at Gallipoli and forged the Anzac spirit which is the cornerstone of our nations. Yes it is a reminder that our freedom does not come cheap.
Waltzing Matilda is a famous song here in Australia, it is a bush ballad. You can watch it here
http://www.youtube.com/watch?v=CwvazMc5EfE
If you hear Waltzing Matilda you can bet an Aussie is involved!