Treaty of Edinburgh–Northampton and cousin, and was crowned in 1306. He decisively defeated the English, under Edward II, at Bannockburn in 1314. Peace talks were held between 1321 and 1324. Little progress was made, as the English refused to recognise Robert the Bruce as King of Scots, although a truce was agreed in 1323, to last thirteen years. Edward II claimed he adhered to this truce, but he allowed English privateers to attack Flemish vessels trading with Scotland. For example, privateers seized the Flemish vessel "Pelarym", worth £2,000, and massacred all the Scots on board. Robert the Bruce demanded justice, but in vain,
John de Warenne, 7th Earl of Surrey Scottish throne, accompanied him on his campaign in Lothian. Balliol created Warenne earl of Strathern, but this was in name only for the properties of the earldom were held by the Scots. Warenne died in 1347 and is buried at the monastery of Lewes. He was succeeded as earl by his nephew Richard Fitzalan, who was also earl of Arundel. On 25 May 1306 Warenne married Joan of Bar, daughter of count Henry III of Bar and Eleanor of England, eldest daughter of king Edward I of England. The two were soon estranged and lived apart, and had no children,