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. Prior to Keyes, the Dover Patrol had been commanded by Admiral Reginald Bacon and had succeeded in sinking two German U-Boats in the English Channel in the previous two years, but out of 88,000 crossings by ships only five had been torpedoed and one sunk by gunfire. After Keyes took control, he altered tactics, and the Dover Patrol sank five U-Boats in the first month after implementation of Keyes' plan. In April 1918 Keyes planned and led the famous raids on the German submarine pens in the Belgian ports of Zeebrugge and Ostend. He was advanced to Commander of the Royal Victorian Order on 30 March 1918 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. Inter-war years Keyes was given command of the new Battlecruiser Squadron hoisting his flag at Scapa Flow in the battlecruiser in March 1919. He moved his flag to the new battlecruiser in early 1920. Promoted to vice-admiral on 16 May 1921, he became Deputy Chief of the Naval Staff in November 1921 and then Commander-in-Chief of the Mediterranean Fleet in June 1925 with promotion to full admiral on 1 March 1926. In January 1928 at a dance on the quarterdeck of the battleship , Rear Admiral Bernard Collard, Second-in-command of the 1st Battle Squadron, openly lambasted Royal Marine Bandmaster, Percy Barnacle, and allegedly said "I won't have a bugger like that in my ship" in