It is ANZAC Day in Australia and New Zealand, which is similar to the American Veterans Day, in that it began as a remembrance of World War I, and has become more generalized over the years.
“Anzac Day commemorates the involvement of Australian and New Zealand troops in a World War I campaign on the Gallipoli peninsula in Turkey.”
The Gallipoli Campaign began as a Winston Churchill [then First Lord of the Admiralty] plan that spun out of control and got a lot of people killed on both sides with nothing much changing, but then, that was quite common in World War I.
Peter Weir made a movie, Gallipoli, which, if nothing else, proves that Sergeant Alvin York, and T.E. Lawrence weren’t the only people who fought in World War I.