The Scots fielded two armies, with Archibald Douglas's force and their
baggage train heading to attack
Carlisle, while another force under the Earl of Douglas and Earl of Moray ravaged the countryside around
Durham and
Newcastle. Northumberland sent his two sons
Harry Hotspur and Sir Ralph Percy to engage while he stayed at
Alnwick to cut off the Scottish retreat. Froissart says that the first fighting included a meeting of the Earl of Douglas and Henry Percy in hand-to-hand combat, in which Percy's
pennon was captured. The Earl of Douglas then moved off, destroying the castle at
Ponteland and besieging Otterburn Castle (now
Otterburn Tower). Percy made a surprise attack on Douglas's encampment in the late afternoon, but first encountered the Earl's serving men, giving the bulk of the forces time to muster and attack them on their flank. James Douglas led the left wing, while Dunbar led the right. Hotspur's men, having ridden up from Newcastle, were tired and disorganized as they made their way onto the field. Hotspur was so overly confident that he attacked the Scots while the rest of his force was still marching up through
Otterburn. During the battle on a moonlit night Douglas was killed; his death had no influence on the outcome of the battle and went unnoticed until much later. The Percys were both captured. Sir John Montgomery, 9th of Eaglesham, captured Henry Percy (later using the ransom to build
Polnoon Castle) with the remaining English force retreating to Newcastle. Despite Percy's force having an estimated three to one advantage over the Scots, Froissart records 1,040 English were captured and 1,860 killed whereas 200 Scots were captured and 100 were killed.
The Westminster Chronicle estimates Scottish casualties at around 500. Some have suggested that Hotspur's rashness and eagerness to engage the Scots and the added tiredness of the English army after its long march north, were the reasons for the English defeat, despite having a three to one advantage in numbers. It is possible that the reasons for this defeat may have been more complex, however. ==Aftermath==