Nyora kupfuurira kweiyi ndima - McLeay akanyoresa muAustralia Imperial Force (AIF) muna May 1915. Akashanda nemapoka ezvokurapa kuMiddle East uye kuWestern Front. Paaiva muFrance semutakuri-wechikwata ne13th Field Ambulance, akapiwa Military Medal nokuda kwoushingi pazuva rokutanga rechipiri Hondo yeVillers-Bretonneux
muna April 1918. Akabudiswa muchiuto zviri pamutemo muna October 1919.