Enlisted 9 May 1916 and embarked in Wellington 19 August 1916 to disembark in Devonport, United Kingdom 25 October 1916. Admitted to the New Zealand Convalescent Hospital, Hornchurch 27 October 1916 until 12 November 1916. Left for France 9 January 1917 and on 14 January 1917 he was admitted to the 20th General Hospital. In 1917 he had numerous admissions to a variety of medical facilities for illness. Transferred to the Rarotongan Company 14 January 1918. Embarked for Egypt 5 June 1918 and arrived at Alexandra 14 June 1918. Posted to the Rarotongan Company 1 July 1918 and admitted to the 33rd Casualty Clearing Station at Jaffa on 2 August 1918 with malaria, transferred to 24th Stationary Hospital 3 August 1918 then 24th Stationary Hospital, Abbassia on 5 August 1918. Discharged Aotea Convalescent Home 18 August 1918. On 10 October 1918 he sustained a GSW (Guns Shot Wound) to the left side of his face and jaw, and was admitted to 76th Casualty Clearing Station at Ludd. Captain Bush's monthly report said this was a suicide attempt and left him with a "very severe wounds to head". Returned as an invalid on SS Malta and on board a Court of Enquiry found that this wound was self inflicted. He was certified as not fit to stand trial by Court Martial. In September 1919 he was a patient at the Woodside Jaw Hospital, Dunedin, and then the orthopaedic ward of Trentham Military Camp Hospital. He returned to Tonga 6 January 1922. His name appears on the Tongan War Memorial as Hapa.