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
Commodore (Royal Navy) appointment of commodore first class has been in abeyance since 1958, leaving the pennant with a single red ball to cover all Royal Navy commodores. Modern commodores wear the sleeve lace previously worn by commodores second class. Commodore has only been a substantive rank in the Royal Navy since 1997. Before then it continued to be an appointment conferred on senior captains holding certain positions. For example, the senior commander of destroyers within a fleet in the Royal Navy could carry the title of "Commodore (D)", while the fleet's senior commander of submarines could carry the title of "Commodore (S)",