Kammala jumla mai zuwa: A ranar 6 ga Disamba, 1941, kwana daya kafin harin Japan a kan Pearl Harbor, an nada Campbell a matsayin kwamandan kwamandan jirgin sama na Marine Aircraft Group 11 da ke zaune a Brown Field a cikin Quantico Base. Ya yi aiki a wannan matsayin har zuwa ranar 25 ga Mayu, 1942, lokacin da Babban Jami'in Harkokin Kasuwanci, Lord Mountbatten, ya zaɓe shi da kansa. An sanya Campbell ga wannan ma'aikatan a matsayin Jami'in Jirgin Sama na Marine Corps kuma babban alhakinsa shi ne ya ba da shawara game da batun Air Cover don ayyukan Commando. Ya shiga cikin shirin
Aikin Dieppe. Campbell ya yi aiki a wannan matsayi har zuwa Afrilu 26, 1943. Don hidimarsa a Ingila, an ba shi mukamin brigadier general kuma an ba shi lambar yabo ta Legion of Merit.