Sphere of influence
A sphere of influence was a metaphorical area surrounding an organization, location, or person where they had a certain amount of  to influence the decisions and thinking of others.

In 2268, Arne Darvin noted that according to the Spacematic's ship's log, Cyrano Jones was within the Klingon Empire's sphere of influence less than four months prior to his visit to Deep Space Station K-7, making him a viable suspected Klingon spy, something Nilz Baris agreed was possible. ()

See also
 Federation aligned species
 Protectorate

External link

Slang
Social sciences