October 12th in history

On October 12, 1176, William d’Aubigny, Earl of Arundel, died. He is best known for wedding Queen Adeliza, the widow of Henry I. Elizabeth Chadwick’s Lady of the English, gives us a very appealing account of their courtship and marriage.
On October 12, 1216, King John—who was not having a good year—lost his crown jewels in The Wash.
On October 12, 1459, the Battle of Ludford Bridge was almost fought. The Yorkist army was already skittish, for they saw the king’s standard flying in the Lancastrian camp and were hesitant about opposing the king himself, even a figurehead king like poor Henry VI. The death blow to their chances occurred that night when Andrew Trollope and six hundred of his men defected to the Lancastrians. The Duke of York and the Earls of Warwick and Salisbury retreated to Ludlow Castle and then fled the country, York and his younger son Edmund going to Wales and then to Ireland, his elder son Edward going to Calais with the Earl of Warwick. York’s wife, Cecily Neville, and her two young sons, George and Richard, were left in Ludlow, awaiting the Lancastrian army the next day on the steps of the high cross. It is interesting to speculate how history might have been changed had Edward been the son to accompany his father to Ireland. If he had, he'd have been with York at Sandal Castle the following December, when York rashly left the castle and fell into a Lancastrian trap. Would Edward have been the one to die on Wakefield Bridge instead of Edmund? Might there have been a King Edmund? It is impossible to answer the first question, but I don’t think a King Edmund was in the cards. Edward won over the Londoners with his personal charm and then won the crown itself on the battlefield. Take him out of the equation and who knows what might have happened.
On October 12, 1492, the crew of Columbus’s Pinta sighted land—the Bahamas—although Columbus remained convinced until his death that he’d found a way to the East Indies.
And on October 12, 1537, the future Edward VI was born. Jane Seymour, his mother, would soon die of childbed fever, so she did not get to enjoy the triumph of doing what neither Katherine of Aragon or Anne Boleyn could—give Henry VIII his longed-for son.