ANZAC is the acronym formed from the initial letters of the Australian and New Zealand Army Corps.This was the formation in which Australian and New Zealand soldiers in Egypt were grouped before the landing on Gallipoli in April 1915.The acronym was first written as “A & NZ Army Corps”.he ANZAC was split into two new formations called I ANZAC Corps and II ANZAC Corps (despite the repetition of the word Corps in their name). Initially, I ANZAC Corps comprised the 1st and 2nd Australian Divisions and the New Zealand division, while the 4th and 5th Australian Divisions were assigned to II ANZAC Corps.