Alfred Gould Dyne was born at Yandina, Queensland on 31 August 1920 and was working as a labourer and serving with the militia when he enlisted in the AIF on 1 July 1941.

Private Dyne, QX21910, embarked at Melbourne in September 1941 with reinforcements to the 2/12th Battalion and joined the battalion at Julis Camp, Palestine (near Ashkelon in modern-day Israel) in January 1942. The next month, Dyne embarked with the 2/12th Battalion aboard HT Nieu Amsterdam for Bombay and from there on to Australia aboard HT Dilwara; arriving in Adelaide in late March 1942.

Dyne saw action at Milne Bay in August 1942 and later in the year was awarded the Military Medal for his actions during the fighting at Buna, Soputa and Sanananda. The citation reads,

'This NCO has given consistent proof of his gallantry and devotion to duty during the New Guinea Campaign. During the BUNA action Sgt Dyne was commanding a section when his Pl [platoon] Cmd [commander] and senior NCO's became casualties; he took over command of the Pl and displayed great leadership in moving the Pl forward under heavy fire to a position from where he was able to bring fire to bear on the enemies' flank; although the platoon suffered heavy casualties he refused to withdraw - his action played an important part in that phase of the battle. During the SOPUTA action Dyne again took over command of 13 Platoon when his Pl Comd was killed; in this action and again at SANANANDA he displayed great personal courage: his leadership, initiative and energy had a marked effect upon all those under his command.'.

Suffering from malaria throughout his service, Sergeant Dyne continued to serve with the 2/12th Battalion in its campaigns in Papua New Guinea and Borneo.

Sergeant Dyne received his discharge on 27 November 1945.