Tuhia he tomokanga mō tēnei wāhanga - I te mutunga o te pakanga, ka nekehia atu a Keysor i Gallipoli e mate ana i te mate uruta. I te mutunga ka uru atu ia ki te 1st Battalion i muri i to ratou whakawhiti ki France i te timatanga o te tau 1916. I te Poutu-te-rangi 1916 i uru a Keysor ki te Pakanga o Pozières. I te marama o Noema 1916 i whakawhitihia ia ki te 42nd Battalion ka whakatairangahia ki te taumata o te kaitiaki i te 1 o Tihema. I te 13 o Hanuere 1917 i whakawhiwhia ia ki te taumata tuarua. E ono marama i muri mai ka whakatairangahia ia hei rangatira. I te 28 o Poutu-te-rangi 1918, i whara a Keysor, ka nekehia atu i te raina i mua i tana hokinga mai ki te uru atu ki nga pakanga i Villers-Bretonneux
, i mate ai ia i te 26 o Mei 1918.