Tuhia he tomokanga mō tēnei wāhanga - I te 6 o Tihema 1941, kotahi rā noa i mua i te whakaekenga a Hapani ki Pearl Harbor, i tohua a Campbell hei rangatira rangatira o te Marine Aircraft Group 11 i tohaina ki Brown Field i roto i te Quantico Base. I mahi ia i tenei kaha tae noa ki te 25 o Mei 1942, i te wa i tohua ai ia e te Tumuaki o nga Mahi Tahi, a Lord Mountbatten. I whakawhiwhia a Campbell ki tenei kaimahi hei Kaitohutohu Rererangi Marine Corps ana ko tana kawenga nui ko te tohutohu mo te kaupapa o te Air Cover mo nga mahi Commando. I whai wāhi ia ki te whakamahere i te Operation Dieppe
He aha? I mahi a Campbell i tenei mana tae noa ki te Paenga-whāwhā 26, 1943. Mo tana mahi i Ingarangi, i whakatairangahia ia ki te tuunga o te rangatira o te brigadier me te whakapaipai ki te Legion of Merit.