Happy St George’s Day !
Although we know little about Saint George, he arguably served as a soldier and was martyred on this day (i.e. 23 April) in 303 during a persecution of Christians under the Roman Emperor Diocletian because he presumably refused to recant his faith. In legends and in iconography he is usually depicted as a dragon slayer.
St George has been the patron saint of England since the 14th century. King Edward III founded the prestigious Order of the Garter in 1348, choosing St George as its patron. For this reason, the cult of St George became immensely popular.
Cannon, John. Ed. Dictionary of British History. Rev. ed. Oxford: OUP, 2009.