During the civil war between Royalists and Puritans, the Campbells had sided with the Puritans, so following their defeat at the Battle of Inverlochy, Clan Lamont took the opportunity to push back the borders of Campbell control. Predictably, in 1646, the Campbells took revenge, and overran Toward Castle; after being offered hospitability, the Campbells slaughtered the Lamont occupants in their beds. Despite the chief of the Lamonts surrendering, the Campbells hanged many members of Clan Lamont, in what became known as the Dunoon massacre.
