Definition of "Anzac"

At Milton the road is blocked by yet another Anzac parade, a straggle of people raw-faced in the cold.

2005, Joe Bennett, A Land of Two Halves, page 43

The Anzacs were pretty drunk, and one of them was saying the Armistice was probably just another bloody piece of lying propaganda

1932, John Dos Passos, 1919, Houghton Mifflin Company 2000, page 233