By this point he had become a powerful military leader, being styled by Walter Bower "Lord of Clydesdale".
[1] In 1335, Moray met with other Scottish nobles to reject the terms of peace offered by Edward III of England, and to reaffirm their resistance to English rule.
He consequently had his lands forfeited by Edward Balliol, who bestowed them on English knight Anthony de Lucy.
[2] The same year, Moray is recorded as having slain a knight named Godfrey Ross, the Sheriff of Ayr and Lanark, who had killed his brother.
Moray received considerable grants of land for his services, and was evidently a favourite of King David.