What is the collar device for a Major in the Marine Corps?

The collar device for a Major in the Marine Corps is represented by a silver oak leaf. This insignia is a key identifier for the rank of Major, distinguishing it from other ranks within the military hierarchy. The use of the silver oak leaf symbolizes authority and leadership, consistent with the responsibilities and status of a Major. In contrast, the gold oak leaf is associated with the rank of Lieutenant Colonel, and a silver bar signifies the rank of Second Lieutenant. The silver eagle serves as an insignia for the rank of Colonel. Understanding these distinctions is crucial for recognizing the rank and role of officers within the Marine Corps structure.