Rubuta ci gaba ga wannan sakin layi - A ranar 6 ga Disamba, 1941, kwana daya kafin harin Japan a kan Pearl Harbor, an nada Campbell a matsayin kwamandan kwamandan Sojojin Ruwa na Sojan Ruwa na 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 Dieppe Operation
Ka yi haƙuri. 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.