At the start of the 1688–1697 Nine Years War, Lieutenant-Colonel Sir Robert Douglas commanded the first battalion at the Battle of Walcourt in 1689. After Schomberg was killed in Ireland, he was promoted Colonel in July 1690. The second battalion arrived from Scotland in 1690 and both battalions fought at the Battle of Steenkerque in 1692, where Sir Robert was killed. They then fought at the Battle of Landen in 1693 and at the Siege of Namur. When the Treaty of Ryswick ended the war in 1697, it was transferred to Ireland.