Union Navy the set of Army ranks. The most visible change was that henceforth some individuals would be designated commodore, rear admiral, vice admiral, and finally admiral, all new formal ranks, and equivalent to, respectively, brigadier general, major general, lieutenant general, and general. A doctrinal shift took place at the same time. Prior to the war, the United States Navy emphasized single-ship operations, but the nature of the conflict soon made use of whole fleets necessary. Already at the Battle of Port Royal (7 November 1861), 77 vessels, including 19 warships, were employed. This was the largest naval expedition that had ever
Admiral of the Fleet (Royal Navy) Admiral of the Fleet (Royal Navy) Admiral of the Fleet is a five-star naval officer rank and the highest rank of the Royal Navy. The five-star NATO rank code is OF-10, equivalent to a field marshal in the British Army or a marshal of the Royal Air Force. Other than honorary appointments no new admirals of the fleet have been named since 1995. The origins of the rank can be traced back to Sir John de Beauchamp, 1st Baron Beauchamp de Warwick, who was appointed 'Admiral of the King's Southern, Northern and Western Fleets' on 18 July 1360. The appointment