Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. An Admiral of the Fleet or Fleet Admiral is a military naval officer of the highest rank. In many nations the rank is reserved for wartime or ceremonial appointments. It is usually a rank above Admiral, and is often held by the most senior Admiral of an entire naval service. It is also a generic term for a senior Admiral in command of a large group of ships, comprising a fleet or, in some cases, a group of fleets. If actually a rank its name can vary depending on the country. In addition to ''Fleet Admiral'' and ''Admiral of the Fleet'', such rank names include, Admiral of the Navy and Grand Admiral. It ranks above Vice Admiral, Rear Admiral and usually full Admiral, and is usually given to a senior Admiral commanding multiple fleets as opposed to just one fleet. It is often classified as a ''5 star rank''.