 They were superiors under the Lord of the Isles of the lands of Lochiel in Lochaber, in addition to the claims of a close marriage alliance (Ewen married a daughter of Celestine of Lochalsh).In 1497 Sir Alexander MacDonald of Lochalsh and his clan rebelled against the King.Lochalsh invaded the fertile lands of Ross-shire where he was defeated by the Clan Mackenzie at the Battle of Drumchatt (1497) and was driven out of Ross-shire.