What is civil administration?
civil administration meaning in Military terminology / glossary / dictionary is:
An administration established by a foreign government in (1) friendly territory, under an agreement with the government of the area concerned, to exercise certain authority normally the function of the local government; or (2) hostile territory, occupied by United States forces, where a foreign government exercises executive, legislative, and judicial authority until an indigenous civil government can be established. Also called CA.
Source: JP 3-05