From Robert Chambers, The Book of Days, 1869:
Butler, the historian of the Romish calendar, repudiates George of Cappadocia, and will have it that the famous saint was born of noble Christian parents, that he entered the army, and rose to a high grade in its ranks, until the persecution of his co-religionists by Diocletian compelled him to throw up his commission, and upbraid the emperor for his cruelty, by which bold conduct he lost his head and won his saintship. Whatever the real character of St. George might have been, he was held in great honour in England from a very early period. While in the calendars of the Greek and Latin churches he shared the twenty-third of April with other saints, a Saxon Martyrology declares the day dedicated to him alone; and after the Conquest his festival was celebrated after the approved fashion of Englishmen.
In 1344, this feast was made memorable by the creation of the noble Order of St. George, or the Blue Garter, the institution being inaugurated by a grand joust, in which forty of England’s best and bravest knights held the lists against the foreign chivalry attracted by the proclamation of the challenge through France, Burgundy, Hainault, Brabant, Flanders, and Germany. In the first year of the reign of Henry V, a council held at London decreed, at the instance of the king himself, that henceforth the feast of St. George should be observed by a double service; and for many years the festival was kept with great splendour at Windsor and other towns. Shakspeare, in Henry VI, makes the Regent Bedford say, on receiving the news of disasters in France:
Bonfires in France I am forthwith to make
To keep our great St. George’s feast withal!’
Edward VI promulgated certain statutes severing the connection between the ‘noble order’ and the saint; but on his death, Mary at once abrogated them as ‘impertinent, and tending to novelty.’ The festival continued to be observed until 1567, when, the ceremonies being thought incompatible with the reformed religion, Elizabeth ordered its discontinuance. James I, however, kept the 23rd of April to some extent, and the revival of the feast in all its glories was only prevented by the Civil War. So late as 1614, it was the custom for fashionable gentlemen to wear blue coats on St. George’s day, probably in imitation of the blue mantle worn by the Knights of the Garter.
In olden times, the standard of St. George was borne before our English kings in battle, and his name was the rallying cry of English warriors. According to Shakspeare, Henry V led the attack on Harfleur to the battle-cry of ‘God for Harry! England! and St. George!’ and ‘God and St. George’ was Talbot’s slogan on the fatal field of Patay. Edward of Wales exhorts his peace-loving parents to
‘Cheer these noble lords,
And hearten those that fight in your defence;
Unsheath your sword, good father, cry St. George!’
The fiery Richard invokes the same saint, and his rival can think of no better name to excite the ardour of his adherents:
‘Advance our standards, set upon our foes,
Our ancient word of courage, fair St. George,
Inspire us with the spleen of fiery dragons.’
England was not the only nation that fought under the banner of St. George, nor was the Order of the Garter the only chivalric institution in his honour. Sicily, Arragon, Valencia, Genoa, Malta, Barcelona, looked up to him as their guardian saint; and as to knightly orders bearing his name, a Venetian Order of St. George was created in 1200, a Spanish in 1317, an Austrian in 1470, a Genoese in 1472, and a Roman in 1492, to say nothing of the more modern ones of Bavaria (1729), Russia (1767), and Hanover (1839).
Legendarily the Sacred Military Constantinian Order of Saint George was founded by the Emperor Constantine (312-337 A.D.). On the factual level, the Constantinian Order is known to have functioned militarily in the Balkans in the 15th century against the Turk under the authority of descendants of the twelfth-century Byzantine Emperor Isaac II Angelus Comnenus.
We Lithuanians liked St. George as well. When I was a boy I attended St. George Lithuanian Parish Elementary School, and served mass at St. George Lithuanian Roman Catholic Church in Shenandoah, Pennsylvania.