Founded in 1625, the Régiment de Touraine was a French infantry regiment raised in the province of Touraine. At the end of 1624, the Protestant stronghold of La Rochelle sent an expedition and besieged Port Louis in Brittany. As no troops were stationed in this province at this time, Louis XIII sent Marshal Bassompierre, which, from Angers, urged Baron du Plessis-Joigny, governor of this city, to create an infantry regiment. The Protestant expedition on Port-Louis was cancelled before the arrival of the newly raised regiment, but it victoriously took part to the siege of the rebellious city between 1627 and 1628. The regiment, commanded by Vicomte de Poudeux, was among forces under Saint Simon brought from the West Indies to Yorktown.