 Complete the following phrase:  Fighting in the north continued, exacerbated by a Scottish invasion led by James III, Margaret of Anjou and Henry VI in 1463. When the Scots sued for peace, Lord Montague was sent to arrange terms. On 25 April 1464, Montague was on his way to Norham. The Duke of Somerset who had surrendered and sworn allegiance with Percy and Percy, forswearing their oaths, attacked Montague with 5,000 men. The site of that battle was 