Whakaotihia te rerenga e whai ake nei: I uru a Rumbold ki te Royal New Zealand Naval Volunteer Reserve a i te tau 1941 i whakaaetia ia mo te whakangungu rangatira i Ingarangi i te Royal Naval College, Greenwich. I te mutunga o tana kura, ka uru atu ia ki te kaipuke whakangaromanga, ka mahi hei kaitiaki tuarua i nga waka o te Arctic. I te tau 1943, i mahi ia i runga i te "Inglefield" i te wā o te
Te pakanga ki Hiti. I ora ia i nga kaipuke i totohu i te Hui-tanguru 1944 i te wa o te Mahi Shingle, a ko ia te tangata whakamutunga i whakarere i te kaipuke, i awhina i etahi atu kaimahi ki te wehe atu, i whakahuatia ai ia i nga panui. Whai muri i te hinganga, i tohua ia hei rangatira rangatira ki a Rear-Admiral Gerald Dickens, e mahi tahi ana me ia i Awherika ki te Raki, Brussels me The Hague.