Campbell brought out former FOXHOUND agent Solid Snake during the Zanzibar Land uprising and served as his commanding officer during Operation: Intrude F014 in 1999. With his supervision, Snake was able to defeat the forces of Zanzibar Land and retrieve the OILIX formula.
In the following year, Campbell retired as FOXHOUND commander for undisclosed reasons, although it is believed he was unhappy with the direction the unit was taking.