The Orion class Battleships Orion, Monarch, Conqueror and Thunderer prior to the Battle of Jutland in 1916. The ships were commissioned in 1912 and saw service with the Home Fleet.
All four ships survived WW1 with Orion and Conqueror being scrapped in 1922, Thunderer was used as a cadet training ship until being scrapped in 1927 and Monarch was converted to a target ship for weapons evaluation and was sunk in 1925.