Following the outbreak of
World War I he enlisted in April 1915 in the
New Zealand Army and was assigned to the New Zealand Rifle Brigade. After service in Egypt he then moved to the Western Front where he was wounded in the head during the New Zealand Division's participation in the
Battle of Flers–Courcelette. The scalp wound resulted in him being sent to England to recover, where he was discharged from the NZEF in March 1917. On 10 May 1917 he was granted a probationary commission in the
Royal Flying Corps as a
second lieutenant, which was confirmed a month later. He was assigned as a pilot to a reconnaissance squadron with most of his duties involving artillery cooperation. During his period he shot down a single enemy aircraft, before being transferred back to England to serve as a flying instructor. After volunteering for frontline service he was assigned to 98 squadron in October 1917, flying the
DH.9 on bombing missions. Based at Abscon airfield he flew his first mission on 9 October when 10 aircraft attacked Mons railway station. During the raid they were attacked by 15 Fokkers and Pfalzes. Two other major raids followed on 14 and 23 October. The later raid, was on the Hirson railway station, which saw two aircraft of the squadron shot down. In addition to these bombing flights he was also undertaking aerial reconnaissance. In 1918 he was transferred to the
Royal Air Force. ==Inter-war years==