Rubuta ci gaba ga wannan sakin layi - A shekara ta 1742, an ba Campbell mukamin Laftanar Janar kuma a lokacin Yaƙin Nasara na Austriya ya bi Sarki zuwa Jamus a matsayin kwamandan sojan doki na Burtaniya kuma ya yi yaƙi a yakin Dettingen
a 1743, inda aka saka shi a matsayin Knight Commander na Order of Bath, da na Fontenoy a 1745, inda ya rasa kafa. Daga baya ya mutu sakamakon raunukan da ya samu a ranar 2 ga Mayu, 1745.