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
History of the Royal Australian Navy s, all to be built in America; in 1980 they announced an additional two vessels both to be built in Australia. The fifteen Australian-built vessels of the made up Australia's patrol boat from 1979 to 2007; they have now been replaced by the fourteen s. The is the newest class of Australian submarines, built in Australia for the Royal Australian Navy. They were constructed by the Australian Submarine Corporation in Adelaide, South Australia, and replace the six s in the Australian fleet. The first vessel, , was laid down in 1990 and commissioned in 1996, with all six vessels of