Harold joined the unit on Timor as a Private from 2/12th Field Ambulance, after the fall of Koepang, approx March 1942. After the campaign on Timor, he embarked with the unit, for Australia aboard the Royal Dutch destroyer “Tjerk Hiddes” on either 11 Dec 1942 or 16 Dec 1942, as the embarkation rolls do not differentiate.
After leave and reorganization he embarked with the unit for New Guinea as a Corporal in the Aust Army Medical Corps Sect, Headquarters Group aboard S.S. “DUNTROON” on 17 Jun 1943 and returned to Australia with them aboard “TAROONA” on 3 Sept 1944.
After further leave and reorganization, he embarked for New Britain aboard “TAROONA” on 9 Apr 1945 with the unit as a Corporal in the Aust Army Medical Corps Sect, Headquarters Group.
He was discharged on 26 Feb 1946.