Anzac: A Nation's Heritage (1965) Online
An abridged version of this film running at about 6-7 minutes shorter (at 19 minutes) was released by Film Australia in 1981.
This film was made to commemorate the 50th Anniversary of the Great War's Anzac Day and the 25th April 1915 landing at Gallipoli in World War I by Australian and New Zealander troops.