Military feuds are feuds or fiefs held by knight-service under the feudal system.
The following is an example of a case law referring to military feuds:
Under the Act Concerning Tenures, tenures by knight service (or military feuds) were converted into free and common socage; that is, an uncertain service at the discretion of his lord, into a fixed and certain rent or service. [JACKSON v. SCHUTZ, 18 Johns. 174, 186 (N.Y. Sup. Ct. 1820)].