Archibald John Kilfoyle was born in Benalla, VIC and was a Labourer by trade when he enlisted from Ballarat in the 39th Battalion, 2nd Reinforcement on 2 May 1916 at the age of 18. His unit embarked from Melbourne, Victoria, on board RMS Orontes on 16 August 1916. In October he reached England and in November he joined the 39th Battalion in France. He was slightly wounded on May 30th 1917 but was able to remain on duty. Just a week later, on June 7th, he was wounded again, this time, gassed. In August he faced a disciplinary charge that æWhen on active service, conduct to the prejudice of good order and military discipline in that he obtained permission to fall out of the line of march on an excuse subsequently found by the C.O. to be unreasonable' for which he forfeited one day's pay. In late 1917 he was troubled by myalgia then in May 1918 he was admitted to hospital suffering from influenza. He returned to Australia on the Soudan, disembarking at Melbourne on June 29th 1919 and took up residence in Eureka Street.

His brother, James Hector Kilfoyle (Tree No 870) also served.
Tree No 2362