 For this reason there was no formal leadership of Clan MacTavish of Dunardry within the Jacobite Army, and some of the MacTavishes found their own way to fight within the ranks of their neighbor, MacIntosh.The MacTavishes were imprisoned based on the "treasonable" letters from Dugald MacTavish, the younger, to Sir James Campbell of Achinbreck indicating plans to raise their men in favor of Prince Charles and the Jacobite cause.On 16 April 1746 at the Battle of Culloden, the Jacobite army was defeated by a much larger force of the British government army (5000 fighting for Prince Charles and 9000 fighting for the government).