The 25th April in Australia and New Zealand is called ANZAC day. The word is from Australia New Zealand Army Corp.
On this day are commemorated the lives of those lost in war. The 25th April is the day in 1915 that the forces under incompetent commanders landed on the coast of Turkey at a place called Gallipoli or Galliboli in Turkish, in an effort to force Turkey out of the great war.
The landings were an unmitigated blunder. In the months that followed only a tiny piece of Turkey was ever held and eventually a retreat was organised. This action was the only one done soundly. Not one life lost.
Many thousands of Anzacs were killed in that campaign and the survivors were sent on to the killing fields of Europe and many more lost before the armistice of 1918. Any US soldier who fought at Bellieau Wood did so along side Australian 'diggers'.
In the second world war once again Anzac forces fought to defend against Nazi and the Imperial Japanese forces with some many thousands more lost before that war too ended. The Japanese POW camps were places of brutality and starvation or more would have survived.
We could add, Malaya, 'confrontation' with Indonesia (1960's) and Vietnam (60's to early 70's) where Australia again lost hundreds dead and from where veterans are still suffering from PTSD.
More recently Iraq and Afghanistan.
So if you hear of the word ANZAC you now know now where it is from.