 The accession to the Scottish throne of William the Lion in 1165 brought border wars, (the war of 1173–74 saw Carlisle besieged twice by the Scottish king's forces, with the city being surrendered by the constable of Carlisle Castle, Robert de Vaux, when food ran out), but no giving up of Cumbria (or Northumberland) to the Scots, despite Henry's troubles after the murder of Thomas Becket and the Scots' alliance with France.The Treaty of Falaise of 1174 formalised a rather coercive peace between the two countries.Indeed, it was around this time that the ancient counties which made up modern Cumbria came into existence.