The War of the three Kingdoms is the last time we hear of the Lamonts acting as a separate political unit. Clan Lamont, still retained strong holdings in Cowal but there is no evidence of the Lamonts joining the Jacobite risings of 1715 or 1745. Indeed it is more likely that Lamonts would have been part of the large contingent of Argyllshire troops that fought for the Hanoverian faction. Since the Lamonts did not participate in the Jacobite Risings, they were spared the reprisals but like every other Highland clan would have to accept the 1746 act of Proscription where the owning of weapons and the wearing of highland dress became illegal. This marked a reduction in the power of clan chiefs and the start of the old highland way of life becoming more like that of the lowland scots.