Supporting Glencairn in the campaign against the Commonwealth was
Ewen Cameron of Lochiel, the Scottish Highland chief of the
Clan Cameron. At that time, Glencairn was in the Eastern Highlands campaigning against Commonwealth occupational troops. Ewen and his clansmen were encamped at Tullich protecting Glencairn’s army against a surprise attack by Commonwealth forces. During this time, a Commonwealth army commanded by General
Robert Lilburne was in pursuit of Glencairn and found their way to Tullich. When the Commonwealth troops approached, Ewen sent a warning to Glencairn and prepared to defend the pass. The fighting started shortly thereafter and the Cameron clansmen stopped the Commonwealth advance, fending off several attacks. As the battle continued, Lilburne's troops also attempted to flank the Royalists but failed. After many hours of fighting and having inflicted heavy losses on the Commonwealth troops, Ewen was ordered to retreat, leaving the pass open. The Commonwealth army, however, were depleted and unable to continue their offensive in the harsh terrain. As the Commonwealth troops fell back and attempted to return to
Inverness, the Royalists went on the offensive, taking advantage of the situation to pursue and harass them for several miles. ==Aftermath==