What rank is associated with O-10?

The rank associated with O-10 is General. In the military ranking system, O-10 represents the highest active-duty ranks for officers. In the Army, Air Force, and Marines, O-10 corresponds to the rank of General, which is the top-level position, often responsible for overseeing large divisions or commands.

While Fleet Admiral is indeed an O-10 rank in the Navy, it is a wartime rank and is not typically used in peacetime. Additionally, the roles of Rear Admiral (Upper Half)/Major General and Vice Admiral/Lieutenant General correspond to lower O-7 and O-8 ranks, respectively. Hence, General accurately matches the O-10 designation in most service branches, solidifying its significance.