Australian infantry wearing Small Box Respirators (SBR). The soldiers are from the 45th Battalion, <a href="https://en.wikipedia.org/wiki/Australian_4th_Division_(World_War_I)" class="extiw" title="en:Australian 4th Division (World War I)">Australian 4th Division</a> at Garter Point near Zonnebeke, Ypres sector, 27 September 1917.
Photo by Captain <a href="//commons.wikimedia.org/wiki/Frank_Hurley" title="Frank Hurley">Frank Hurley</a>.
1917-09-27
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