 Lachlan Og led the clan in the Archibald Campbell, 7th Earl of Argyll's campaign against Sir James Macdonald of Islay and his rebellion in 1615.Lachlan Maclachlan of that Ilk was succeeded by his son Archibald, who is reckoned as the fifteenth chief of the clan.In 1680 Archibald had his lands erected into a barony by Charles II of England called the Barony of Strathlachlan which was centred on Castle Lachlan.