On 6 December 1941, only one day before the Japanese
Attack on Pearl Harbor, Campbell was appointed commanding officer of the
Marine Aircraft Group 11 stationed at
Brown Field within Quantico Base. He served in this capacity until 25 May 1942, when he was personally selected by Chief of
Combined Operations,
Lord Mountbatten. Campbell was assigned to this staff as Marine Corps Aviation Officer and his main responsibility was to advise in the matter of Air Cover for
Commando operations. He participated in the planning of
Dieppe Operation. Campbell served in this capacity until April 26, 1943. For his service in England, he was promoted to the rank of
brigadier general and decorated with the
Legion of Merit. Campbell arrived to the United States in June 1943 and reported at
Headquarters Marine Corps. He has been subsequently transferred to
Samoa in August 1943 and took command of
4th Marine Aircraft Wing stationed there. The 4th Marine Wing served as Aircraft Defense Force, Samoan Area, a part of Defense Forces, Samoan Group under Major General
Charles F. B. Price. Campbell remained in this capacity until July 1944, when he was appointed commanding general of the
2nd Marine Aircraft Wing. Following the
Battle of Peleliu, Campbell served simultaneously as Peleliu Island Commander. He was succeeded by Brigadier General
Christian F. Schilt in March 1945 and returned to the United States. Campbell was appointed commanding general of the
9th Marine Aircraft Wing and
Marine Corps Air Station Cherry Point. He served in this capacity until his retirement in November 1947. Campbell was advanced to the rank of
major general on the retired list for having been specially commended in combat. ==Later life==