Clan Mackenzie in the 13th and 14th centuries, terminated in the heiress Margaret del Ard, the Lady of Erchless, who married Alexander Chisolm of Cromer c.1350. In the 14th century during the Wars of Scottish Independence the Clan Mackenzie is said to have been among the clans who fought on the side of Robert the Bruce at the Battle of Inverurie (1308) against the forces of the Clan Comyn who were rivals to the throne. Chief Iain Mac Coinnich is said to have led a force of five hundred Mackenzies at the Battle of Bannockburn in 1314 where the English were defeated.
Robert the Bruce Aberdeen and Buchan were destroyed and their inhabitants killed. Bruce ordered similar harryings in Argyle and Kintyre, in the territories of Clan MacDougall. With these acts, Bruce had successfully destroyed the power of the Comyns, which had controlled much of northern and southwestern Scotland for over 150 years. He then crossed to Argyll and defeated the MacDougalls (allies of the Comyns) at the Battle of Pass of Brander and took Dunstaffnage Castle, the last major stronghold of the Comyns. In March 1309, Bruce held his first parliament at St. Andrews and by August he controlled all of Scotland north of