Dillon's Regiment was first raised as part of the Irish Army in 1688 by Theobald, 7th Viscount Dillon. During the Williamite War the regiment went to France in April 1690 as part of Lord Mountcashel's Irish Brigade, in exchange for some French regiments amounting to 6,000 troops. After the Treaty of Limerick in 1691, the regiment remained in the service of the kings of France under its present name. It was next commanded in France by Theobald's younger son, Colonel Arthur Dillon, until 1733.