Both parties in the Armagnac-Burgondian civil war sought support from Henry IV, King of England. In May 1412, the Armagnacs suffered a second reverse at the Treaty of Bourges. The Armagnacs offered Henry IV full sovereignty in Gascony in return for an army of 4,000 men. Thomas, Duke of Clarence, a fiery cavalry general, demanded considerable territorial concessions including Normandy in return for aid to Burgundy. Now desperate to save the honour of the Oriflamme the Armagnacs resorted to seeking English arbitration in the internal dispute. At the Treaty of Buzancais the English demanded a punitively large ransom from the Armagnacs. In a series of humiliating encounters their leading general, Dauphin Louis, Duke of Guyenne was outmanoeuvred, defeated and forced into a Treaty of Auxerre.