1. George Creasy continued his war service as chief staff officer to the First Sea Lord, as director of anti-submarine warfare and then as flag captain to the commander-in-chief of Home Fleet before becoming chief staff officer to the naval commander-in-chief of the Allied Expeditionary Force, taking part in the planning and execution of the naval operations for the Normandy landings.
George Creasy served as Flag Officer Submarines, taking responsibility for receiving surrendered enemy submarines into British ports at the end of the war.
George Creasy served in the First World War, initially in HMS Conqueror in the Grand Fleet but transferred to the torpedo-boat destroyer HMS Lively in the Harwich Force on 15 May 1915.
George Creasy joined the Mining School at Portsmouth in May 1918 and then started the long course at the torpedo school HMS Vernon in November 1918.
George Creasy successfully passed his exams at HMS Vernon and then became torpedo lieutenant in the destroyer HMS Malcolm in the Atlantic Fleet in July 1920.
George Creasy joined the directing staff at HMS Vernon in July 1922 and, having attended the Royal Naval College, he was promoted to lieutenant-commander on 15 December 1924.
George Creasy became torpedo officer in the cruiser HMS Frobisher, flagship of the 1st Cruiser Squadron in the Mediterranean Fleet, in April 1926, torpedo officer in the battleship HMS Warspite, flagship of the Mediterranean Fleet, in October 1926 and torpedo officer in the battleship HMS Rodney in the Atlantic Fleet in June 1928.
George Creasy went on to be captain of the 1st Destroyer Flotilla in the Mediterranean Fleet and commanding officer of the destroyer HMS Grenville in May 1938.
George Creasy served in the Second World War, initially as commanding officer of HMS Grenville, which was sunk off Kentish Knock in January 1940.
George Creasy then transferred to the destroyer HMS Codrington, in which he led the rescue of Juliana of the Netherlands in May 1940 and then took part in the Dunkirk evacuation later that month.
George Creasy was awarded the Distinguished Service Order for his skill and initiative during these two operations on 11 July 1940.
George Creasy became chief staff officer to the First Sea Lord in June 1940 and director of anti-submarine warfare in September 1940.
George Creasy was appointed a Commander of the Dutch Order of Orange-Nassau on 12 May 1942, and became flag captain to the commander-in-chief of the Home Fleet in the battleship HMS Duke of York in September 1942.
George Creasy was appointed to the Polish Order of Polonia Restituta, Third Class, on 22 December 1942 and a Commander of the Order of the British Empire on 1 January 1943.
George Creasy was appointed a Commander of the American Legion of Merit on 28 May 1946.
George Creasy was promoted to Admiral of the Fleet on 22 April 1955 and then retired in 1957.
In 1924 George Creasy married Monica Frances Ullathorne; they had a daughter and a son.
George Creasy was president of the Essex branch of the Royal British Legion and took an interest in fishing and shooting.
George Creasy died at his home in Great Horkesley in Essex on 31 October 1972 and was buried in St Peter and St Paul's Churchyard at Little Horkesley.