ANZAC: Australian and New Zealand Army Corps. On the 25th April, Australia and New Zealand celebrate the first major battle fought by Australian and New Zealand soldiers at Gallipoli in Turkey during World War 1. It is a day to remember the courage of the soldiers in this battle and the courage and sacrifice of all men and women who have served their country in times of war. April 25, 1915. We don't celebrate, we remember and commemorate, Lest We Forget.