Jellicoe, Sir John Rushworth, a British admiral who was in command of the Grand Fleet of Great Britain from 1914 to 1916. Jellicoe was born in 1859 and entered the navy at the age of thirteen. He served in Egypt in 1882, where he won a medal. Soon after this he was raised to the rank of lieutenant and won a prize at the Royal Naval Academy. Jellicoe served in China from 1898 to 1901, where he was chief of staff to Vice-Admiral Seymour, during the Boxer Rebellion. In 1907 Jellicoe was made rear-admiral and in 1914 he was given command of the Grand Fleet. He commanded the fleet in the Battle of Jutland in 1916. Later in the year he was succeeded by Sir David Beatty
and became First Lord of the Admiralty. Jellicoe was made admiral in 1917, and the same year he relinquished his position.