 It was then at Camp American University, but departed for France on 1 December 1917.He was assistant to the Chief Engineer, Advance Section, Line of Communications, from 25 January to 23 April 1918, when he returned to his regiment, which was then in the vicinity of Amiens as part of the Australian Corps.It rejoined the 3rd Division on 30 May, and participated in the Second Battle of the Marne.