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 a period with one or more allied English noble families, such as the de Clares of Gloucester, or perhaps even in the English royal household. Sir Thomas Grey asserted in his "Scalacronica" that in about 1292, Robert the Bruce, then aged eighteen, was a 'young bachelor of King Edward's Chamber'. While there remains little firm evidence of Robert's presence at Edward's court, on 8 April 1296 both Robert and his father were pursued through the English Chancery for their private household debts of £60 by several merchants of Winchester. This raises the possibility that young Robert the Bruce was on