John de Vere, 13th Earl of Oxford (8 September 1442 10 March 1513) was one of the principal Lancastrian commanders during the English Wars of the Roses. Early in the reign of Edward IV, Oxford's father, the 12th Earl, and his elder brother were executed for plotting against the king (1462). However, Edward was pursuing a policy of conciliation with Lancastrian families, and de Vere was allowed to succeed to his father's estates and titles. He was allowed to assume his family's traditional role as Lord High Chamberlain, officiating in that capacity at the coronation of Edward's queen, Elizabeth Woodville, in 1465. Around the same time he married Margaret Neville, daughter of Alice Montagu, Countess of Salisbury, and sister of Richard Neville, Earl of Warwick. In 1468 Oxford was caught in a plot against the king. He spent a short time in the Tower of London, but was released and pardoned early in 1469. He probably avoided execution due to the influence of his brother-in-law. Oxfordwas very likely quietly involved in Warwick's schemes against Edward in 1469 and 1470. In the latter year he fled to Margaret of Anjou's court in exile in France.