What is the rank insignia for a Navy or Marine Corps O-10?

The rank insignia for a Navy or Marine Corps O-10 is represented by four silver stars. This designation indicates the highest rank of an Admiral in the Navy or a General in the Marine Corps. The use of four stars is a long-standing tradition that signifies senior leadership within the military branches, conveying a level of authority and responsibility.

In the context of military structure, ranks are associated with specific roles and the level of command, and the distinction of four stars clearly identifies the individual as holding the highest possible rank within their respective service. The insignia is worn on uniforms and is an important symbol of rank and achievement in the Navy and Marine Corps.