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
Uniforms of the Royal Navy junior ratings in this rig. This is the same as for Officer's No. 3 dress but with the relevant rate insignia and seaman's cap (or beret). Junior rates are only issued with short-sleeve shirts and are not issued with ties. This is divided into 3B (without jersey) and 3C dress (navy-blue jersey worn over the shirt with the shirt collar out). There is no equivalent of 3A dress for junior ratings. Junior ratings, in common with all ranks and rates of the Royal Navy, are currently (2015) in the middle of the process of being issued the new No4. RNPCS