Enlisted in Auckland New Zealand at Narrow Neck Military Training Camp 21 October 1915. Disembarked at Suez 15 March 1916 and embarked for France 9 April 1916.Admitted to 11th Static Hospital 7 September 1916 with trench fever, transferred to UK by hospital ship 12 September 1916 and admitted to NZ General Hospital, Brokenhurst 14 September 1916.Transferred to the NZ Depot Codford 7 October 1916 and returned to France 15 November 1916. Attached to the NZ Tunnelling Company NZE 6 December 1916 until rejoining the NZ Pioneer Battalion 26 February 1917. Transferred to the Rarotongan Company 14 January 1918 and embarked for Egypt from Marseille 21 January 1918. Posted to the Rarotongan Company 15 February 1918. Admitted to 128th Field Ambulance from 16 May to 26 May 1918, and on 2 August 1918 admitted to 33rd Static Hospital, Jaffa dangerously ill with pneumonia. Out of danger by 6 August 1918, he was transferred to 36th Stationary Hospital, Gaza, then to 27th General Hospital, Cairo on 12 August to 23 August 1918. Admitted to Aotea Convalescent Home on 23 September to 29 September 1918 when he joined the New Zealand Mounted Rifle Bde Training Regiment and Base depot. Embarked on SS Malta 14 December 1918 and discharged in New Zealand 7 March 1919.
Died from tuberculosis 3 September 1923 in Aitutaki.

Older brother of Private Tauei ISAACS 5th Rarotongan Contingent