23rd February » Traditional date for the publication of the Gutenberg Bible, the first Western culture named Western book printed with movable type.
1st May » Battle of Arkinholm, Royal forces end the Black Douglas hegemony in Scotland.
22nd May » Start of the Wars of the Roses: at the First Battle of St Albans, Richard of York, 3rd Duke of York called Richard, Duke of York, defeats and captures King Henry VI of England.