, 1918;
Imperial War Museum When the First World War broke out, Keyes took command of the Eighth Submarine Flotilla at
Harwich. Keyes took charge in an operation in March 1915 when six trawlers and the cruiser attempted to clear the Kephez minefield. The operation was a failure, as the Turkish mobile artillery pieces bombarded Keyes's minesweeping squadron. Heavy damage was inflicted on four of the six trawlers, while HMS
Amethyst was badly hit and had her steering gear damaged. After another abortive attempt to clear the mines a few days later, the naval attempt to force the straits was abandoned and instead troops were landed to assault the guns. For his service during the Dardanelles Campaign, Keyes was appointed a
Companion of the Order of St Michael and St George on 1 January 1916 and awarded the
Distinguished Service Order on 3 June 1916. Keyes took command of the
battleship in the
Grand Fleet in June 1916 and, having been promoted to
rear-admiral on 10 April 1917, became second in command of the
4th Battle Squadron with his flag in the battleship in June 1917. He went on to be Director of Plans at the Admiralty in October 1917 and then became
Commander-in-Chief, Dover and commander of the
Dover Patrol in January 1918. After Keyes took control, he altered tactics, and the Dover Patrol sank five U-boats in the first month after implementation of Keyes's plan. In April 1918 Keyes planned and led the famous
raids on the German submarine pens in the
Belgian ports of
Zeebrugge and
Ostend. and promoted
Knight Commander of the Order of the Bath on 24 April 1918. In May 1918 he was involved in remote control trials of unmanned aerial vehicles by the
Royal Navy's D.C.B. Section. He was then advanced to
Knight Commander of the Royal Victorian Order on 10 December 1918 and made a
baronet on 29 December 1919. In March 1919 he was appointed (Acting) Vice-Admiral in command of the
Battle Cruiser Force until it was disbanded in April 1919. ==Interwar period==