The Treaty of Canterbury was a diplomatic agreement concluded between Sigismund, Holy Roman Emperor, and King Henry V of England on 15 August 1416.
Upon his arrival, Sigismund was made a Knight of the Garter, viewed a session of parliament and was gifted a golden necklace that was created by Hermann Ruissel and featured white enamel bears, one of Henry's heraldic devices.
However, Bernard of Armagnac, having lost the Battle of Valmont in 1416, convinced Charles VI and the French government to reject the embassy because he believed that it was just a scheme that would result in the English gaining the territory of Harfleur.
[3] However, before the end of Henry V's reign, the policies established by the Treaty of Canterbury had been abandoned because Sigismund became more involved in the Council of Constance and his control over Bohemian territory and less concerned with Anglo-French politics.
All of those distractions meant that Sigismund was never able to create any military support and that the true intent of the treaty was not fulfilled.