Grand Fleet Grand Fleet The Grand Fleet was the main fleet of the Royal Navy during the First World War. Formed in August 1914 from the First Fleet and elements of the Second Fleet of the Home Fleets, the Grand Fleet included 25–35 state-of-the-art capital ships. It was initially commanded by Admiral Sir John Jellicoe. He was succeeded by Admiral Sir David Beatty in December 1916. The Grand Fleet was based first at Scapa Flow in the Orkney Islands and later at Rosyth on the Firth of Forth. It took part in the biggest fleet action of the war – the Battle
British home army in the First World War an invasion, going so far as to inform the War Office in February that the loss of so many of his troops to the field army overseas absolved him of the responsibility for home defence. Admiral John Fisher, a former First Sea Lord, was concerned about the increasing U-boat menace, and believed that the German war leader, Field Marshall Paul von Hindenburg, would be willing to risk the High Seas Fleet in an invasion attempt. The Admiralty regarded the risk as possible rather than probable, and guaranteed to be able to disrupt an enemy fleet within 32 to 36 hours