British home army in the First World War bridge between Tilbury and Gravesend. There were fears that a German fleet protected by mines and submarines could land a 100,000-strong force before the British Grand Fleet could steam the south from its base at Scapa Flow. To counter this threat, the Admiralty redeployed pre-dreadnought battleships and submarines closer to vulnerable ports, expanded the coastwatch and increased patrolling of the North Sea. In October, Churchill responded to Kitchener's call for the Royal Navy to take more specific precautions against invasion by insisting that the role of the Grand Fleet was to eliminate an invader's covering fleet rather than defeat the
HMS Emperor of India day, the entire fleet sortied for a sweep in the North Sea, which concluded on 27 December; this was "Emperor of India"s first fleet operation. Another round of gunnery drills followed on 10–13 January 1915 west of the Orkney and Shetland Islands, this time with the entire fleet. On the evening of 23 January, the bulk of the Grand Fleet sailed in support of Beatty's Battlecruiser Fleet, but the main fleet did not become engaged in the Battle of Dogger Bank that took place the following day. On 7–10 March, the Grand Fleet conducted a sweep in the northern North