St George, Patron Saint of England, was an officer in the Roman army who died on 23rd April 303. Little is known of him, though the most famous story is of his conquest over a dragon! King Edward 3rd declared him Patron of the newly formed order of chivalry - the Knights of the Garter.
In more modern times, St George was chosen by Baden-Powell, its founder, to be patron of the Scouting Movement, and on St George's Day, scouts are bidden to remember their Promise and the Scout Law. Baden-Powell recounted in Scouting for Boys that the Knights of the Round Table 'had as their patron saint St George because he was the only one of all the saints who was a horseman. He is the patron saint of cavalry, from which the word chivalry is derived'.