Andrew Harclay, 1st Earl of Carlisle the Scots, under the command of Robert the Bruce, at the Battle of Old Byland in Yorkshire. The English commander, John of Brittany, Earl of Richmond, was taken prisoner, while the king himself barely escaped capture. It was the worst defeat the English had suffered in the wars since the Battle of Bannockburn in 1314. Harclay had received a summons to join the royal army, but had not been able to bring his troops south in time to come to the king's rescue. The event convinced him that the war against Scotland could not be won under the leadership of
Robert the Bruce queen dowager) are unlikely but not impossible. Bruce and his followers returned to the Scottish mainland in February in two groups. One, led by Bruce and his brother Edward, landed at Turnberry Castle and began a guerrilla war in south-west Scotland. The other, led by his brothers Thomas and Alexander, landed slightly further south in Loch Ryan, but they were soon captured and executed. In April, Bruce won a small victory over the English at the Battle of Glen Trool, before defeating Aymer de Valence, 2nd Earl of Pembroke, at the Battle of Loudoun Hill. At the same time, James