Following the outbreak of the First World War, Culling volunteered for the Samoa Expeditionary Force, then being raised specifically for the capture of
German Samoa. However, he was prevented from departing New Zealand by his father, who had contacted authorities, pointing out his age. Only men of 20 years or older were being allowed to serve aboard and Culling was still only 18. The following year, in August, Culling left New Zealand for England to join the
Royal Naval Air Service. In September 1916, as a flight sub-lieutenant, ==Notes==