The 23rd Battalion was an infantry battalion of the Australian Army. It was raised in 1915 as part of the Australian Imperial Force for service during World War I and formed part of the 6th Brigade, a
Soldiers from the 6th Brigade, of which the 23rd Battalion was a part, at Warloy, August 1916
The 21st Battalion was an infantry battalion of the Australian Army. It was raised in 1915 as part of the First Australian Imperial Force for service during World War I and formed part of the 6th Brig
Troops from the 21st Battalion prepare to abandon the Southland after it was torpedoed by a German submarine, September 1915
Members of the 21st Battalion receiving inoculations prior to deployment to Gallipoli
The 21st Battalion attacks Mont St Quentin, 1 September 1918