Amongst the thousands of Jacobite prisoners taken during the Forty-five, a body which reflects the diversity of the movement both internationally and pan-culturally, a significant portion of these were regular or professional soldiers in the service of other countries. In the middle of the eighteenth century, the nation that made the largest non-British contribution to the Jacobite army, as would be expected, was France. Though it was already fighting a frustrating war on the Continent against its old enemy Great Britain, maintaining a good relationship with the Scots on the northern border of the ‘Atlantic Archipelago’ made sound strategic sense and was seemingly worth the questionable support and, at least, lip-service to the Stuart cause.
In addition to harboring elements of the exiled Stuart Court since the Revolution, Louis XIV and Louis XV were de facto enablers of the Jacobite cause, maintaining l’Auld Alliance not only to suit their own needs. France was in on Jacobite designs since at least 1701 (a year which featured the double-catastrophe of the War of Spanish Succession and the death of James II and VII), and it lent a significant force of soldiers and materiel to aid the attempted Jacobite invasions of Britain in 1708, 1715, and 1744-6. The only French troops that ever really saw significant fighting on British soil in the eighteenth century, however, were those companies and regiments – mostly made up of men from Scotland and Ireland – in service to the two Louies.