The regiment was originally formed in 1689 by Brigadier James Wynne as James Wynne's Regiment of Dragoons. It fought at the Battle of the Boyne in July 1690 and at the Battle of Aughrim later that month under King William III. Renamed the Royal Dragoons of Ireland in 1704, it went on to fight under the Duke of Marlborough at the Battle of Blenheim in August 1704 during the War of the Spanish Succession. At the Battle of Ramillies in May 1706 the regiment helped capture the entire French "Regiment du Roi", after which it fought at the Battle of Oudenarde in July 1708 and at the Battle of Malplaquet in September 1709.