In April 1916, at the age of 19, Hall enlisted in the
Australian Imperial Force (AIF). After training, he was posted to
54th Battalion, then serving on the
Western Front in France. He was wounded in late March 1917, within two months of arriving in France. Back in the front lines by late April, he saw action during the
Battle of Bullecourt and later, during the second phase of the
Battle of Passchendaele, in the
Battle of Polygon Wood. He was promoted to
corporal after this latter battle. After the
Battle of St. Quentin Canal, Hall's battalion amalgamated with the
56th Battalion in October 1918, becoming the 54th/56th Battalion. He was promoted to
sergeant with this unit before being discharged from the AIF in August 1919. ==Later life==