How do you become an anzac?

Answer 1

You cannot.

ANZAC stands for Australian & New Zealand Army Corps. It was created in 1914 when both countries accepted the call to arms from Britain. It was disbanded shortly after the disastorous Gallipoli Campaign. The New Zealanders became the New Zealand Expeditionary Force (NZEF) and the Australians became the Australian Infantry Force (AIF). However there are records of an I Anzac and II Anzac serving in the battle of Broodseinde (made from three Australian and one New Zealand division).

After the war both countries retained separate military forces. There are no more Anzacs left, the last Survivor of Gallipoli died in 2002, if memory serves me correctly.