Encyclopedia
The Australian National Flag
In both wars, Australians fought under the Blue Ensign (since 1953 the Australian National Flag), the Red Ensign (since 1953 the Australian Red Ensign, the proper colours for merchant ships registered in Australia), and the Union Flag (the Union Jack).
In the First World War, both Australian ensigns and the Union Jack were used in recruiting posters, postcards and badges. In the Second World War, the Australian ensigns were used more frequently.

Melbourne, VIC. 16 August 1945. Two young children in front of the Shrine
of Remembrance (one holding an Australian Flag).
AWM 112689

