Which of the following is not considered an appurtenance?

Bravery Medals are not considered an appurtenance because they serve as individual awards recognizing an act of bravery or heroism, rather than being an insignia or decoration that denotes service in a specific capacity or duration, which is the typical definition of appurtenances in military terms. Appurtenances generally refer to devices like numerals, service stars, and oak leaf clusters that indicate additional accomplishments or qualifications related to the awarded medals. These elements enhance the meaning of the main award, whereas bravery medals stand alone as distinct honors for exemplary courage. Understanding this distinction clarifies the role and purpose of various military accolades and awards.